Hi.
I guess you found the right one to talk to ... I own 2 X32s (rack and compact) as well as a VS-700.
First of all, they are totally different animals, you can't compare.
The X32 is a full blown digital mixer with an incredible price/value ratio, great scalability if you use S16/S32 snakes etc. and I'm very happy with both of mine (despite a funky and very special problem I had lately that you can read about in this forum). I use the X32s for mixing live shows (where it also acts as audio interface to supply a number of backing tracks from Sonar) and for live recordings ...I would not use it in the studio, neither DAW control nor quality of the onboard FX processors is anywhere close to what I expect from pro equipment ... and it's limited to 44.1/48 kHz ...
PROS & CONS (IMHO and thus totally subjective) ...
X32 PROs :
- MIDAS preamps
- scene storage/recall
- 32 IN / 32 OUT
- remote control from Android/iPad
X32 CONS:
- DAW control via MCU protocol extremely limited (only track control like mute, solo, arm, no control over busses etc.)
- onboard FX can't compare to VST quality
- only 44.1 kHz / 48 kHZ (which is OK for live, but in the studio we're at 96 kHZ for a reason)
As regards the VS-700 you need to distinguish between the 2 components: VS-700R and VS-700C, both of which are officially discontinued but still work quite well with Sonar.
Nevertheless I would no longer recommend buying the VS-700R, which is the rack unit with the preamps and the FANTOM synth. I still use it (because it works and the preamps are of good quality), but there is better stuff out there ... the VS-700R is quite noisy, you may not see another driver update ever, and the FANTOM synth is superseded by all the VSTis out there ...
The VS-700C, which is just the MIDI controller, is still probably the best, offering the most complete functionality of all Sonar controllers. There are some feature from the Sonar 8.5 days which are no longer supported, but most are ... and the workflow experience is great ... if you are just looking for a way to control Sonar like you would from a mix desk than this gets probably as close as you can get at the moment (with no real positive outlook that anything better will come anytime soon) ... following the forum I read that the SSL stuff (despite being more expensive) does not seem to be at a comparable level when it comes to controlling Sonar (but other will be able to tell you more) on that ... if you are willing to take risk in terms of future drive updates, the VS-700 on ebay may be a relevant option ...