Another help me choose a combo thread

[oldcatfish]

Hey TB'rs, how about helping me out. I play mostly at churches. I had been running direct and using either the venue's bass amp, or my own powered speaker as a monitor. My powered speaker has about had it, so now I'm considering buying a combo amp. It should be an easy decision, but there are a few features that I need. My budget is $500 max, and I do prefer new to used.
--Must have XLR output.
--Must be loud enough to be heard at moderate volumes for rehearsals without PA support, but with a drummer. The Acoustic B200 and Fender Rumble 150 are plenty loud, to give you an idea.
--Must be very reliable.
--Must be fairly lightweight. Under 50 pounds would be great.
--Must have extension speaker output.
--Must be fairly decent sounding with acoustic guitar and electric (with a multi-effect board), though 90 percent use will be bass.
--Must be able to handle 4 string bass and 5 string.

I've played through a lot of combo amps, and though there are decent ones, none of them really stand out for everything I need.

I haven't tried the GK amps or Roland Cube 100. Would they fit the bill, or should I look into another powered speaker?

Thanks for any help and suggestions.