Yamaha DTXpress/DTXplorer/DTXtreme

Hi

I want to buy an amp to use with my DTXpress that will be good enough 
for playing live.

I will probably put some sound through the PA as well but want a 
decent amp in front of the kit.

I know I need a keyboard amp and have been looking at the Roland KC 
range and the Peavey KB range.

I see a few people on this group have purchased the Behringer KX1200 - 
are these ok for live use or do I need to spend more money say on a 
Roland KC-550 or Peavey KB-5.

Any help would be appreciated as I only want to get this right first 
time.

It needs to sound good as I currently go through the PA which sounds 
excellent but we are overloading it a bit.

Many thanks

Darrell