JBL - makes great stuff. They're top of the line products really are worth the premium you pay in price. Their mid range gear is very good too and price competitive - and the midrange gear is at least on par to the products with which they compete; Mackie, etc.

JBL's EON series cabs are easily portable - but the higher level products are just so much better for full range reproduction and dispersion.

12 channels is lot for a trio. It will cost you, because it bumps you up from the standard 8 channel mixer - BUT you need what you need.

Mackie makes good gear. Spirit Folio make very fine electronics - for mixers, and they're designed and manufactured in the UK. I would look very carefully at them - especially with your 12 channel needs. Buying a 12 channel, mixer/power amp unit will cost you a lot more then buying a stand alone 12 channel mix console - and a power amp from Crown or one of the others.

I am convinced that Crown make the best power amps. Their CE series is their mid-priced product - and it's high quality, last forever stuff. Their high end products are even better.

You probably need good speaker cabs, with one 15" (woofer) and an 1 1/2" compression horn. This is pretty standard design, and a few companies have good product offerings like this. I like the JBLs - but Mackie, Yamaha and several others make good designs too. There are some poor quality look alikes, so choose wisely.

Think about monitors too. With that many channels to mix, you may have difficulty hearing well, without monitor/s.

JBL's very good mid-priced gear is called the M-Pro series. If you're looking at used gear (and that would probably be good, if you can find some), the equivalent is the MR series. Their SR and SRX series are top of the line. Damned expensive - but damned good.

Anyway - best of luck. Shopping for gear can be fun, especially if have a budget to work with!