Our Quartet consists of me on trumpet/flugelhorn; a guitar, upright bass and drums. We are using a Bose PAS Model 2 with two bass units. In small clubs we just run the guitar (through a Line 6 POD) and bass (via a David Gage Realist pickup). Outdoors and in larger venues I use a AMT Roam 1 Elite clip on wireless mic. We have not needed to mic the drummer (although we have a set of overhead mikes we could use if needed)
The Bose unit is easy to carry around/set up and fits in the back seat of my car. We always consider weight and setup/breakdown, that is why the LED's make so much sense.
Right now we can setup/breakdown in less that 30 minutes. We what to make sure adding lights will not increase this time substantially.