i have a Radial Bassbone,its a high quality twin channel amp and Di in a floor box with lots of useable features,which you can use without anything else.There's no typical answer here,some pub bands are reasonably quiet and get by with a good live backline mix and a bit help from a pa,vocals and a bit drum perhaps.Our set up is full range PA Which everything runs through including drums ,cymbals etc then being a rock band we have the usual heavy helping of backline which really for me is a glorified monitor but some gigs i have no real out front monitoring to help me