XenonMan,

H/K currently sells two stereo receivers in the under $500 range along with the high-priced HK990. The HK 3490 has two digital inputs:
http://www.harmankardon.com/estore/hk/us/shop/Amplifiers/-Receivers/cat370040

This is the upcoming Yamaha model I was referring to, it has 4 digital inputs and network connectivity, it's priced at $599:
http://usa.yamaha.com/products/audio-visual/hifi-components/stereo-receivers/r-n500_u/?mode=model

If you look on amazon.com for the RR2150 you'll see that in the 'Customers who viewed this item also viewed' category is the HK 3490 (along with other stereo receivers)
http://www.amazon.com/Outlaw-Audio-RR-2150-OUTLAW/dp/B001ENW9RE

…and if you scroll down to the 'What other items do Customers buy after looking at this item', the HK 3490 is there again.

Here are some links to a couple of RR2150 vs HK receiver threads on Outlaw's forum:
http://ubb.outlawaudio.com/ubbthreads/ub...ite_id=1#import
http://ubb.outlawaudio.com/ubbthreads/ub...ite_id=1#import

I don't know what else I can do to convince you that these HK receivers (and a few others from mainstream brands) do indeed directly compete with the RR2150.

Heck, this review from audioholics also mentions the lack of digital optical and coax connections as a 'con'.
http://www.audioholics.com/av-receiver-reviews/outlaw-audio-rr2150-receiver-review

I think the RR2150 is a great receiver, but think it would be even better with a few more digital inputs.

-John