Why aren't there more Blu Ray/DVD transports?

I really don't get it. If you have a great pre/pro with excellent Dac's then why do you need to pay twice with a player that has Dac's. I have a nice 2 channel system and would like to complete the home theater experience for the family and for entertaining and I would like to keep the home theater on par with my 2 channel or at least close ( I don't know if I can afford or want to pay what I need to match my 2 channel). However when I start researching I get a little confused and irritate by this market condition. I hate to pay for something twice.

Am I missing something?