I have been recording in my home for the past 3 years, and I have accumulated a pretty good list of gear. The sound I am getting currently, I am pretty statisifed with, however I feel as if I could be getting more from the vocals. I just wanted some suggestions into the world of tubed mics. Would it make more sense to get a tube mic or just get a tube pre amp for my LD mic that I am currently using. I have about a $600 budget on this one.