In terms of arrangers, the Korg pa1x and the Gem Genesys series both have hard disk recording both having 2 audio inputs. If I am not mistaken, the Korg has an XLR microphone input.

The Tyros II sounds interesting because it sounds as if that would be able to do up to 4 separate tracks of recording.
If you wanted to splurge, there is also the Mediastation 76 and other keyboards in that price range and sophistication.

And of course you know the most recent workstations from Yamaha, Korg and Roland, have in some way hard disk recording.