Klipsch Forte IIs, which amp?

Get a 20 to 50 watt tube amp. Given your budget restrictions, a little Cayin A50T or similar integrated will likely sound much better with your Forte IIs than any entry-level SS separates.

This past week I heard the Klipsch Forte III's w/a new Luxman SQ-N150. It's a 10 wpc push pull tube integrated w/four EL-84 pentodes and 2 ECC-83 tubes. Great full sound from the setup. 

I agree with georgehifi.  The Klipsch Forte were my first really good speakers.  I was new to the hobby and poor in the late 80's and used them with an SS NAD integrated amp. Not a bad combination but they could get tinny and glare with those early CD's.  Looking back, the Jolida JD-1000a integrated amp with it's EL-34 tubes I use in a 2nd system would have been a perfect match. The EL-34's have a nice high frequency roll off, a warm detailed mid range and plenty of bass.  Good Luck.

Pass ACA monos with my Forte II's. Plenty of volume in my listening room.