I need to replace my practice amp (Ashdown 5-Fifteen combo) with something more powerful, as it's being totally drowned by the drums. Have checked out what's available locally on my tiny budget, and have narrowed it down to a choice between a Fender Rumble 150 head/410 cab and a Laney RB9 stack. The Laney head has twice as much watts as the Fender (300 vs. 150), but the Fenders are 4 ohms while the Laneys are 8. I have no idea how those figures effect the real power of the amps. And if equal, which sounds best, or are of better quality? I've never brought my own amp to a gig, so this is for rehersals only. I use no effects or pedals at all, and almost always one of my Precision basses. I wish I could go to a store and try them out myself, but none of the local shops have them (or anything similar), so I'll have to buy online. So I'll let you guys decide.