Yamaha DTXpress/DTXplorer/DTXtreme

I am looking for recommendations on midi sequencing software/home 
studio software for my pc. Are there any that are better for use with 
the Yamaha DTX products? I'm also looking for low cost, as I am a 
newbie who doesn't want to invest a bunch of money into something 
that I may be overwhelmed by and loose interest in.

Any input would be appreciated!