Regarding the Strymon pedals, it is possible to use them with a stereo input (by way of an internal jumper), though I generally use pedals with mono-output devices (SEM, Moog stuff, etc.).
I've shifted over the years from multiple-reverb (e.g., ambience + hall) setups to individual modulation + delay feeds into a global reverb (e.g., bright hall), corresponding to a shift away from digital sampled sound sources (for which, I feel, reverbs are a necessary tone-shaping element) to largely analogue ones.
As an aside: the only downside with guitar pedals is the need to properly gain-stage them, which can be a problem when using mono line-level instruments with hot outputs. I generally find this to be a bigger problem with DSP-based guitar pedals* (less so with Strymon), and especially noticeable when using effects whose internal resolution maxes out at 48 kHz or less (e.g., Earthquaker Devices).
SS' recommendation of the Lexicon units is very sensible (I actually have a Lexicon MX200 which allows for a dual mono to stereo feed, among other useful functions), though their sound signature is very apparent after some extended listening.
* - some of this has to do with the analogue design utilized on less-expensive DSP-based devices for purposes of reducing cost; inexpensive all-analogue devices tend to gradually overdrive which adds its own subtle character to the sound.