Hey Bloggingitguy,
To tug on software updates and hopes.... check out the very upper top left of your 990 when it arrives ( btw - congrats on your new purchase. it is a cool peice of equipment)....
The display has the capability of lighting up "THX" symbol.
I took a double take when i saw it and dove in the manual for some hidden paragraphy ... but to no avail.

And to further the flame, i found this on Cirrus Logic's web site: This is under the CS49400 digital signal processor (DSP) used in the 990.
Quote:

"The CS49400 features a comprehensive audio framework including customizable programming and certified software applications that enable manufacturers to quickly and cost effectively design solutions that meet worldwide compatibility standards and provide consumers with an enhanced audio experience. Included in the framework’s certified application portfolio are state-of-the-art audio decoders and sound enhancement programs, such as DTS 96/24, Dolby Digital™, AAC, and THX™."

You are a software upgrade away from enjoying THX products from the 990.

BTW, thanks for the links to THX. good stuff.