Here are few threads where folks have talked about their rigs and reasons for them. You will see there is a very diverse collection of rigs used. The first one, another one and yet another.  
 
A search of the site will provide more.  
 
Keith

My back is feeling better these days. My rig isn't massive. I play with friends on weekends and some open mics at some pubs. My 98 Rogue 5 runs through the  F-1X to a Carvin DCM 1000 into 2 Aguilar GS 112's. Real deep and fat. Nothing real big but the sound. Great for a medium venue.