I have an FTP and it seems pretty good, but I also have a GR-55 and prefer the gtr-to-midi on that to the FTP. That's a question of setup though. Since I already have a system set up and working I haven't spent the time to nail down the FTP set up. YMMV. The Boss GP-10 is about $100 bucks more than the FTP, but has some nice features. The wireless aspect of the FTP is nice. Have you checked out VGuitar Forums? You'll find a lot of comments/info there.
www.
vguitarforums.com
I couldn't tell from this thread if you've played midi guitar before. If not, just an FYI, it's really a different instrument - you need a very clean playing style and good palm damping technique is helpful.
I have used the FTP with Rapture. I like rapture, but tend to use Omnisphere for synth and Alchemy for a sampler. I've used it with Z3ta+2, I have the full version of Lounge Lizard and have used it with that as well as some of the Korg synths - the wave station & M1. Reaktor is nice. Guitar synth in general is a lot of fun. The Boss SY-300 looks like it will be fun, but that isn't guitar-to-midi.
Most of the stuff I record I use guitar synth on.
https://sites.google.com/site/phoenixtaiji/music Anything besides drum & guitar is guitar synth, but not necessarily guitar-to-midi, I favor the vg-99. All the bass is vg-99. Everything is recorded in some version of Sonar ...