Well let's review the facts Rev2 has DCO's not VCO's and we know there ain't much difference between the the first two,
Yes it does not have 4 Lfo's true but can use 4 effects simoultanously which for me is key killer feature the rev 2 lacks.
Not sure what you're saying it but the oscs on the peak are pure digital, and they are 100% analog on the Rev2 (just digital controlled for tuning just like a Juno 60, JX-3P... insert your favored analog DCO synth here). Digital oscs like on peak or even prophet 12 or pro 2 never react or sound quite the same as real analog. It's true that many don't care and maybe can't even hear, but I can and many others can.
For example this Peak sound here from their site:
https://soundcloud.com/novation_peak/sweet-saw-pad is a typical example of why I'd never own peak over rev2. To me it's glaringly obvious that isn't analog. It's weak, it's thin, its ineffective and it's hardly much better than a soft synth. The filter's cool but it sounds plastic, it sounds 'fake', it sounds like a VERY VERY good softsynth. But that's all. If that was on rev2 it would sound rich, emotional, three dimensional and pleasing. Even as a "mere" DCO synth with "only" curtis filters, its miles ahead of digital oscs if analog sound is your goal. Never ever buy a hybrid synth like Prophet 12, Pro 2 or Peak if analog sound is what you desire and what excites you into using it. I've used a ton of software, va and older hybrids myself and my ears can't take that plastic sound anymore. I don't want to get into a battle about this but lets say tastes differ as do ears and those who bought and love rev2 know why they did, others seem like they don't know what they want and will just buy a synth, any synth, regardless of the engine or tech underneath if it makes cool sounds and is a good price. That isn't me! I've had far too many synths in my life to get excited about those types of synths anymore.
We bought REV2 because it's all analog, I personally would never buy any new hardware with digital oscs even with the best analog filter in the world because I have a ton of digital synths at my control in software or older, characterful digital synths I can run through my moog filters or w/e. Why stop at peak? why not mention any hybrid, even some with keyboards like pro2 and prophet 12 etc... sure there are lots of synths out there than can do more than rev2 but they aren't rev2, they aren't 8 voice *analog* polys with a good bit of modulation and enough FX to be handy but not too many to become a burden to sound (that we buy analog synths for). Sounds to me like you just didn't really want a synth like the rev2 and are happier with something like the peak. Personally I fail to see the connection, one is a 5 octave quality built analog synth, the other is a desktop, mostly software based synth in a box with an analog filter on it (no matter how cool the engine is).
As for a squeaky key? Sorry but I can't even begin to take that seriously, sure it shouldn't do it from new, but I've owned so many vintage analogs and made it a routine to clean the keys as in strip them down entirely, bathe them in soap, clean the contacts AND regrease them. Flipping the lid on the rev2 - simplicity itself, and putting a touch of lube on one key isn't going to make me give up on one of the best analog synths in years, nor is this small but irritating osc fault/gremlin that some of us are sadly experiencing.
I pressed DSI for a public answer too so I'm not excusing it, and even as well priced as rev2 is it is still expensive and should be nigh on perfect, but as with anything on the net it gets blown out of proportion when reading a forum that is mostly only here to deal with complaints and bug reports. The hundreds/thousands of happy rev2 owners aren't here posting about dodgy oscs because they either don't care (as it's not a very obvious issue in most cases) or because they don't have it. Those of us who do have it are/have been dealt with by DSI and if that doesn't fix it then we return it (if we choose). I wouldn't buy a peak or any hybrid if I returned the rev2. I'd be fine with the other analogs I have here from the 80s, including very nice sounding VCO stuff (but simpler than rev2). The DCOs in rev2 have their own beauty too, I'm not a VCO stalwart but I like to have them around to compliment the rev2. And I do like some old digitals too (and own some) but won't be spending big money on any digital oscillators in hardware, certainly not while the rev2 exists and is exactly the kind of 'pure' synth I've wanted but with enough power to do what I need (inc control features that the prophet 6 lacks).