I own a Bryston SP-1, and think it is a terrific unit. I wanted a pre/pro with a really first-class analog pass thru to use with my LP collection, and I have been very pleased with the SP-1. As noted above, the SP-1 uses the same preamp circuit found in their BP-25 preamp. I highly recommend the SP-1, which is built in a modular fashion so it can be upgraded if/when video standards change -- and, of course, it carries a 20-year transferrable warranty.
If I remember correctly, the B&K Reference 30 also has a pass-thru analog circuit -- but check the B&K web site to be sure.
If I remember correctly, the B&K Reference 30 also has a pass-thru analog circuit -- but check the B&K web site to be sure.