Hard to pick something for someone else. There's the Parasound A21, which can be had used in the $1500-$1800 range. Built like a tank. 250wpc. Has only been out for about 10 years, so none of them are very old. Still in production, so you can find them just 2 or 3 years old. Conrad Johnson 2550 is very nice. Their 2275SE is just 135 watts but filled with high-end Teflon caps, said to be very good. There's also a 2550SE but pricier.
Bryston 4B-SST's can be had for reasonable prices. They made a 4B-NRB, 4B-ST, 4B-SST, 4B-SST2 and 4B-Cubed (current model). The NRB's are pretty old now. They all came with a 20 year transferable warranty, no receipt required. So if you find one with a 2005 build date, it still has 8 years of warranty remaining.
There's the Cary SA-200 and a 200.2. This amp is well regarded and you could stay in the Dennis Had family of products.
http://www.positive-feedback.com/Issue61/cary200.2.htm I've seen them selling used in the low 2K range.
Lots of others out there, these are just a few.
I'd love to find a real 97-98dB speaker which connected with me. That would make my 17wpc Inspire act like a 75watt amp, as compared to with my 91dB speakers. That would be nice. I bet your triode Inspire makes a glorious 6 watts.