ok... so i've been checking a lot of stuff for my recording gig... i want to be able to do mixes and play keys, insert samples, and so on... so because i recently sold my roland em-2000 (it's funny but i miss it... but money...) i'm thinking of buying one of those midi controllers like the ones from evolution and m-audio! i'd like to check a few and i need it to have a few knobs so i can tweak effects and stuff... anyone has advice on this? what's the difference in them? any special thing in consideration? i'd like to stay between 200 and 300 max... http://www.zzounds.com/cat--61-Key-Keyboard-Controllers--2685 hope to hear from you guys! thanks!