I've seen a lot of discussion going on about the head vs pre+power amp issue, and some posts about using PA cabs as bass cabs. But I want to revamp the topic (since the ones talking about cabs are old and don't want to resuscitate them, see if I can sort some things out. I plan on getting a digital preamp (Not sure if Line 6, Tech 21, TC Electronic or what, but that's not the issue here) and hook it up to a stereo PA power amp and some cab. I want to keep the costs minimal, I found a Yamaha AX15 (15" cone + 1" twitter, 400WRMS, passive PA speaker) on sale for 120 (160$ aprox.). Do you think it is suitable to hook this and a sufficient power amp for on-stage bass monitoring? I'm all for flatness and fidelity (even if it's not high-fi) and practicity, don't care for big brands or brand "tones", just want a flat response like the I would get from my studio monitors, not a colored vintage or modern amp&cab sound. Also can't afford expensive PA setups or huge systems, limited budged to around 400, less if possible). What do you all think?