Yamaha DTXpress/DTXplorer/DTXtreme

Good morning my fellow drummers. I don't want to ask a question that 
has allreddy been covered several times. just need a some past dates 
concerning the DTXPRESS 3 vs DTXTREME. I have the DTXPRESS 3 and might 
possibly need to upgrade. Im trying to understand exactly. What all I 
can do with MIDI. The  owners manual is vague. I need to understand 
midi.(importing sounds/storing ect.)I'm really interested in more 
realistic sampled drum sounds. And can the DTXPRESS 3 accomadate all 
this? Would the guys at Drumbalaya be a good source of council?
Thanks in advance 

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