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

Hey guys,

I'm looking to get a new keyboard controller, and was looking for 
some input.
I already have an XL-7 (and love it). But I want to expand my sound 
set.

Was undecieded between getting an MK-6, or getting the Pure Phatt 
ROM and a Radium controller. 

Are the sounds of the MK-6 much different from the Pure Phatt ROM? 
From what I've read, it seems like they are the same, with just some 
different presets.

Thanks,
Bill