What are some amps I can buy used that are made by ampeg and above the B2-R. Is the B2-RE really worth all the extra money? All im looking for is best deal used for an ampeg, since all I really know about is the B2-R. Is there anything else out there that fits in this catagory. Icame up with this little list. What would you guys get? B2-R B2-RE SVT450 http://www.musiciansfriend.com/produ...ead?sku=481756 SVT-3 PRO?