Need Headphone amp under $300?


I'm in need of headphone amp under $300. I'll be buying some cans in the future as well.(Sennheiser HD-580's / Beyerdynamic DT-880 or AKG K-501's ?) Prefer to stick w/SS. Creek is coming out a new model, the OBH-21 I believe. Sumiko makes a model as well. Anyone familiar w/these models or could you recommend something else in this price range. Thanks, Bill.
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Thanks for your replies. I've done some research on the two sites you've mentioned (BTW, great web-sites!), a I've came up w/these impressions. All three cans which I'm considering are all very highly regarded. However, for the $ the AKG-240S has really caught my attention. These can be bought around $100 new @ a few places. As far as headphone amps, the Meier-Audio "Cordia HA-1" caught my eye. The Perreaux looks interesting as well but doesn't have the "crossfield" effects as does the "Cordia." The MF-X Can and the Grado are well-regarded as well, but the Grado uses batteries and the MF uses tubes, which has its +/-'s. I'm using a Kora tube hybrid int. amp so I'd like to go SS w/the headphone amp. My local dealer whom I purchased the Kora from I'm sure could offer a discount on a Creek. I'll be doing some research/auditioning shortly. Thanks for your replies. I appreciate it! Bill
I use Stax SRM1 SS unit with STAX SR5 electrostatic ear-speakers. I found this combo fast and superior to many Grado combinations and very comfortable on your ears and head(wich is very important as well). You can get them used for a-bit above $300 or sell it for the same price if you won't like it. Well worth to try.
Headromm Home is ss, can be purchased used for about $300, has crossfield circuit. Sounds great w/my HD 600s.
Ditto MF X-CAN V2 with Senn HD600s. I have read that upgrading the cable to the phones improves the sound too but haven't tried that tweak...yet!
I've also got the x-can with the senn hd 600's. It sound's velvety smooth to me.