> I have heard the A111 is better, but will the A110 still be enough to play some solos with it
> Is that I'm not sure how much I can invest, and if the A110 is enough, I guess I'm better off just getting those at first so that I can get a more complex modular system...

The A-110 is absolutely fine. I have two of them myself, although I haven't heard an A-111 for comparison. I think if you didn't have the A-111 to compare it to, you certainly wouldn't have any hesitation about the A-110. It seems completely stable to me (although I tend to slightly detune mine on purpose to thicken the sound), it has a good range, various waveform types, and oscillator sync. It's versatile enough for most requirements (certainly any that I can dream up), and sounds great. Relax. :)

All the best,
Zoe.