I have $3000 (maybe a little more) that I'm going to use to upgrade my mic or preamp...or both. Considering that I have the following, what would you recommend I upgrade, and to what? KEEP IN MIND THIS IS A MIC THAT WILL BE USED 95% FOR RAP! AKG 414 DBX 286A Basically, how will I see the greatest improvement in my ending vocal sound? Thanks in advance for the advice! Here is the booth (for your acoustic treatment viewing).