I have one of these (http://www.newegg.com/Product/Produc...82E16856119072
) attached to my TV. Does everything you ask (including playing ripped blu-rays) without breaking a sweat. Installed Win7, and XBMC, and am exceptionally happy.
It doesn't have a DVD drive, so if you want to play them you'll either have to rip them, or buy an external drive.
I have a Sony Blu-Ray player, and tried to use it. What a POS! The menuing system for going through the various features was slower than a dog, it didn't work well with any of the DLNA servers I set up; I simply gave up on it.