I just got the VT20X last week. I'm liking it a lot. Went with it because it was a little less expensive compared to the AV15. Pros are all the factory presets, user preset options and large variety of effects, tones etc. On the other hand the AV15 is a simpler modeling amp in a good way. I like the amp models available on the AV a little better than the VT series and the effects are adequate for my purposes. It would have been nice if it came with two channels like the larger AV's. I haven't tried the AV so I'm wondering if anyone has played them back to back and if so what are your thoughts or opinions of these two amps. I'm tempted to return the VT and get an AV just not sure.