Re: roland cube vs line6 spider II
I've got a cube 30 & a spider II 15 watt.
The cube is better overall, but like anything else it depends on your taste.
The spider is loud, built well, but is more suited if you like crazy distortion/metal (their insane channel is insane!) The crunch mode is their version of a vintage marshall tone, and its actually not bad. It has some interesting "hidden" features, distortion boost & a noise gate. The distortion boost dirties up the signal to each amp model, and I just discovered you can turn that on for the clean channel as well, which is essential because without it the clean channel sounds very weird. Also, the reverb is not that great, although the other fx are good if you like that sort of thing.
I've gone back & forth with this amp, at first I loved it, then I hated it, now I'm starting to appreciate it again. If you are under 30 and are a metal type, you will love this amp. If you are an old fart classic rocker you would probably prefer the roland, which throws off more vingtage style tones.
I have never heard the 15, but overall I think roland cube 30 is a better product, but it's $70 more than the spider 15. The cube 15 I believe is actually cheaper than the spider. If I was starting from scratch, I would probably get the behringer vintager at $100 bucks and go from there, you should check those out, they are a great value.
The roland has something for everyone, whereas the spider is more "youth" oriented. If you like your metal, go with the spider, if you like more variety, go with the cube.