i currently own a carlsbro bassline50 (50W) which is just about ok to be heard in practices (i'm in a metal band, guitarist has a 50w amp and drummer plays loud) but the sound is very fuzzy and unclear, espesially with finger picking. I need an amp which will either already hold up in small/medium gig situations or is good for small and can be upgradeable for larger gigs. I want to spend about £500 ($710 ish). should i get a combo or a stack? i found an ashdown mag 200w combo for £375 ($515), is this a good deal? what should i get? is it a good idea to go second hand?