Emu XL-7 & MP-7 User's Group

I currently own an MC-909 and was thinking of selling it to purchase 
the MP-7 and three roms. (Protean Drums ROM, Beat Garden ROM, Vintage 
Collection ROM) Im thinking this would give me more sounds than the 
MC-909 currently has. But I have a few concerns. 
The mc-909 is rock solid. Doesnt crash at all. Is the MP-7 this way?
ALso the mc909 can sequence up to 16 peices of gear. This is useful 
for my collection of synths. I see that the command staion has two 
midi outputs but can I still midi chain my synths together to 
controll more than two pieces of gear? 
                         thank you