Hello.. Now that i just purchased my FW 1804 I thought to my self that the sounds im getting could be better. ( this could be because i was listening to how good the guitars and vocals sound on the JOHN MAYER track) I know this could have been done by mastering .. 4 About 500$ do you guys have a suggestion on what kind of pre i should get?? or should i go ahead and get a compressor? which would be more beneficial? TKHNS!