HE-5 for $229 at HR B-stock.
Edit: Looks like $450 is pricey. I'm seeing $350-400 for used units within the last 7 years. I also read that if the converter develops an issue, then any repairs are unlikely.
I don't know if the PS Audio Digitla Link III is a good unit, nor do I know if this is actually a good deal, but people here love the PWD and this is on "sale"http://www.musicdirect.com/p-7414-ps-audio-digital-link-iii-dac.aspx
WOW! They must have gone .... no longer there.