The 808s is a great choice. If you need a few more channels for whatever reason, you can slave a cheap mini-mixer to one of the stereo channels. Most gigs, mono with 600 watts for the mains and 600 for the monitors is plenty.
Alternately, Mackie makes a larger version called the PPM1012 that looks even better if you want to deal with transport.
As for cabs, I like neo speakers for transportability. If you have the budget, JBL gets high grades for the EON line. If not, Peavey has a cab that can be picked up for $200 a piece.
If you're thinking about powered cabs, you should consider the weight in throwing them up on the stands. It's why I opted for the powered mixer alternative.
As a side note, my bass rig runs through a QSC 24xx power amp. I only need one side, so the other side can back up or augment the PA if more power is needed.