Try picking up a Jungson JA-88D.
These can be found used on Audiogon for around $900.00. That's what I paid for mine, and it was the best money I've ever spent. 80 watts of class A power. It has a very organic sound with pleasant highs, and mids that are astouding for the price. Only problem is that it is a beast of an amp, perhaps a little too big for an office, but it looks as good as it sounds. The three reviews I've read all say that it combines the best of SS and Tubes. It does run warm, but not hot.
If you think it's too big you may want to check out the JA-88C, a slightly smaller amp with a similar sound so I'm told.