Yamaha DTXpress/DTXplorer/DTXtreme

I'm about to venture into the world of electronic drums... Choices 
are between the cheap Roland set (TD6-K) and DTXpressII for now. 
Most music stores recommend Roland sets for some reason...

One of my "problems" is that the whole thing has to be transport-
friendly (airplane)... Can anyone tell me if the DTX rack (and/or 
maybe the Roland) can be fully split into small pieces?

Also; I see almost nothing here about people using programs like 
Reason for their electronic drums - isn't there any program that can 
compensate for a cheap head like the DTXpress one, in some way?

Ole-Martin