The GNX4 is all about recording. It uses a different type of memory card that has more space on it, it has more outs for home or studio use, and programmable drum beats I believe. The GNX3 has more drum beats than I'll use and I don't really care about any of the other stuff either so I'm not bothering to upgrade.
I've had mine since they came out and I love it! It has some great tones and the eight track recorder has almost an hour of recording time with the 128mb flash card. I use it at work ( I teach guitar in a tiny closet in the back of a local music store) and it is a great tool for teaching. One of the other teachers actually uses his for gigging. Check out Pauls Guitar Solo( Suicide Solution) at www.BelieverUSA.com to hear his live tone. Its a very poorly edited version of the song. They only included like 3:30 of the almost 12 minute version of the song that they did that night.
The stock Mesa patch is ok, but if you tweak it a bit you can come alot closer to a mesa sound.
What do you plug this thing it into? A clean Keyboard amp?? I got a Boss GT-5, that I use in my Mesa's effects loop, but I sometimes just plug into my 2 Roland KC-100 keyboard amps for stereo using the GT-5 pre-amps.
At work I use a 15 watt Ibeenhad practice amp and at home I would use a 50 watt peavey power amp into a Marshall 1960A cab(bought a Vetta so I hardly ever use it at home now). The clip in one of my posts is a GNX3 into a Marshall 100/100 power amp into 4 Marshall 4x12s. Paul(the guy in the clip) gets a great tone for live shows.
Hey joe, I would assume that you have a seperate output for the drum machine/samples to your guitar signal? Is this how it works, so you can send the guitar signal to your amp and the other stuff straight to a PA? It would seem pretty useless otherwise.
I was very impressed by the GNX 1 I had (GNX 3 could do everything the GNX 1 did and more). It had beautiful clean sounds - much nicer than anything I've obtained from my current rig (V-Amp Pro), which I also like. The GNX also had some nice, crushing distortion sounds. It's built like a tank, and the controls layout is very simple and logical. Also, Digitech has a great forum, where you can get excellent advice and some great patches. Plus, as someone else pointed out, you can get patches from current guitar mags. Overall, it's a great unit. I say go for it. [img]images/icons/grin.gif[/img]