Re: Synergy amps - any opinions
I feel Vai is a bit behind the times about amp modelers (especially since he's admitted he likes models of effects units just fine). But then, most modelers haven't modeled the guitar amps he likes best (his Legacy series, etc). I've heard him make some comments about digital latency that are nonsensical with modern modelers. But so what, there's no reason for him to change what works for him just for change's sake.
It's not like it has to be either/or, for that matter. 4CM (4 Cable Method) wiring, where you can use your Helix (or Axe-FX) before, after, both, neither, alongside or instead of the preamp, is a great way to get the particular analog sounds you feel are missing from your digital modeler, and still integrate whatever parts of a modeler you do like (even if it's just effects).
For a tube setup where you want to mix and match your personal favorites, there are some excellent options there. They've got a lot of talented engineers making sure their designs meet their standards when translated to modules. I wish they'd gotten independent EQs on more of the modules, but that can be rough on noise/space/cost. Still, your favorite power amps (or their $1200 SYN5050), $800 for the SYN2 2-slot host, and another $400/module for most of them is pretty aggressive for what it does. I wonder how many SYN2s and modules the average Synergy buyer eventually winds up with. Heck of a list of options there. Diezel, Engl, Friedman, Metropoulos, Morgan, Soldano, and with Egnater and Fryette contributing. OS preamp module looks really intriguing, as few modelers even attempt a Dumble Overdrive Special model, nevermind do it justice. Hearing a lot of rave reviews of the modules, even from people who have owned the actual amps in question.