After realizing that a preset does not include both parts, and that SUMMIT is also two hardwired synths like the REV2, there are actually only one feature I'd be missing compared to the PEAK, and that is the single play mode with 16 voices... if they made an update to PEAK that would allow polychaining two PEAKs, and added the dual filter mode in an OS update, then a PEAK would generally be just one half of the SUMMIT.
This means that layering becomes less important, as I could just as well layer a PEAK with the REV2... I cannot create a complete two layer preset on SUMMIT, if multimode is simply pointing to two single part presets... it works like the "old school way" with multis and presets... change a preset, and any multi that use that preset will now sound different... that wa the cool thing about REV2 because it has all in the same preset.
This makes me hesitate getting a SUMMIT, especially when there is only a keyboard version... I'll probably stick with my PEAK until a module SUMMIT eventually sees the light of day.... even if the dual filter mode is a hardware change and cannot be done on PEAK, it's still not enough I feel.
I really do like the SUMMIT... and it looks really really sexy too... it will be hard to resist, but I think it's best for me to wait and see what happens next from Novation... but damn, I'd like to have 16 voices to play with!