well i was planning on buying a 4.5XL and a 3500 or 5000 amp, but i played around at the store today and realized the truth! those aluminum speakers suck! the hartke cab didn't sound nearly as clear or loud as any of the others. i also tried out an eden 4x10 (extremely nice low-end) and a new peavey 4x10 (sounded very realistic to me, like how a bass guitar should sound!). ultimately i decided to order a peavey 4x12 since it costed about the same as the hartke anyway! i think i will be getting a firebass 700 to go with it unless it's really expensive.