get tranducers on your guitars - they are less difficult to amplify than mic-ing up the guitar.

I find that the fender passport 150 is fine for most small gigs - though I also use a fender acoustasonic combo 150 watt xombo for the guitar. The new model is very light - less than 20lb.

The yamaha stagepass also fairly good, and ergonomic. It comes in different sizes.