I'll second Benies suggestion for Space Tech Labs. I recently listened to their pre, hooked up to a Sim w5 and a pair of Maggies. It really is a great pre-amp. For the money? an excellent pre-amp.
Also make a really fine passive, wich I prefered.
http://www.space-tech-lab.com/
Also make a really fine passive, wich I prefered.
http://www.space-tech-lab.com/