I am very new to HT technologies. Both of these players play DVD Audio and SACD correct? Why would I pay more money for a 2900 over the 45a? Just so you know I have: Denon 3802 7-ch Infinity Interlude setup 36" Wega TV Not sure what I am looking for in the price differences. I would like to move up to a DVD-A and SACD player. Thanks for any help.