oh sorry bit delayed =D hehe didnt see this post. i cant really compare to anything. but over all i really like them. has effects on each of the RMP-3 and also on the RMX 40. pretty much just like the cdj 1000's size and what not.. the RMX 40 isnt so much like the djm 800 i think its that one.. it does have 4 channels but doesn't have as many effects like the 800. but over all awesome product. i dont use the MIDI.. mapping was wired so i just stuffed it, trying to save up for traktor so i can just use time coders. over all i like.. but if you can go for the industry standard and go the djm 800 + cdj 1000's