I would suggest an Onix/Melody SP3 integrated amp. It has 38 watts per channel, Huge Trannies, 2 inputs, uses 4 5881 tubes, and it sounds wonderful. Check it out on www.av123.com. Look at the reviews. You may find something of interest. I have not had this amp IMO system yet but I will soon. I have two friends locally that do have them and I can say it sounds very interesting.
Also understand that tube amps do not have the control in the bottom end that solid state amps have. I was once told by an old audio guy to, "buy an amp with as much metal as you can get. The bigger the transformers the better the sound." I think he may be on to something.
Also check this site for the SP3 too. The prices are coming down on these lately. Not a bad thing just lots of them for sale. I assure you that the prices won't stay low for long. This integrated amp is built better than some amps costing 3 to 4 times as much.