I guess it all depends on what you want to do doesn't it?
How about playing SACD or DVD-A discs? Wiring KEF speakers in for full 7.1 audio in DTS-HD?
As I said, I have a HTPC running through my AV and it gets a lot of use, but it's no replacement for my OPPO Bluray player. Best of both worlds...
I have a blu ray burner, Pioneer's most recent best, don't remember the model number offhand. Cannot only read those, and a lot other types, I can burn 'em too.
And my system is 7.1 audio... everything doubled: 14 JBL studio monitors, two JBL 2269H 18" drivers in self designed and constructed cabinets... they literally shake the house. I only realize it in other areas of the house because when I'm in my theater room, it shakes me, too!!!