This idea (HTPC handles room correction) is one of the big reasons I'm considering finally getting around to building a HTPC. I was originally eyeballing a receiver with XT32 (Denon 4311/Onkyo NR3009, both >=$1200), but since I'll likely be building a brand new PC this year anyhows, I figured it'd be worthwhile to take a look at seeing if something was available for HTPC use that would allow the use of an older/cheaper receiver yet still yield comparable/better results.
Two options that have come up in my initial research:
Dirac Live Room Correction Suitehttp://www.dirac.se/en/consumer-prod...irac-live.aspx
The Dirac suite is the one I'm particularly interested in -- Dirac is the room correction algo used in the Datasat products, also chosen for use in an upcoming Theta CB upgrade. *Nice* stuff.
A recent thread over in the 20k+ forum comparing Dirac with Trinnov:http://www.avsforum.com/avs-vb/showthread.php?t=1366849
Granted, seems like Dirac runtime will probably cost $700 or thereabouts so might not fit your "reasonably priced" goal.
Considering that the alternative ways to get your hands on this tech start at an "early adopter" price of ~$1800 (upcoming KAD DL2) and go up from there...
Audiolense seems to be often used with JRiver, not sure how Dirac will work (seems it shows up as a pseudo-sound card of sorts?).
At any rate, seems like it makes sense to throw some of the considerable processing power that can be available in a HTPC at room correction. I'm completely new to HTPCs though (and have been out of HT in general for a few years) so am a bit clueless as to how to get video and 7.1 audio out of the HTPC and into the amps...more research required.