Amp matching for Klipsch Forte III

Thank you all for your comments and tips. I like seeing the adjective "fun" in several of them. That's what I'm looking for. My current "fun" speakers are a nice vintage pair of JBL L112s, but as I have been experimenting with some different gear over the last few months, I no longer have an amp that will give them the power that they like. This is why my eye was wandering to the Forte IIIs. The XA-25 has good warmth, and I have a Primaluna EVO 300 preamp that I can use if I need some more.

Thanks decooney, the tubes are stock. 

Thanks, I ordered a pair of the Brimars to try. I've enjoyed it with the stock tubes. Will probably get the Forte IIIs in the next couple of weeks. 

An update...I've had the Forte IIIs for about three weeks now, driving them with a Pass Labs XP-12 preamp and XA-25 power amp. So far, I love some things about them, but don't love the presentation as a whole. With this set up, the Fortes are very dynamic and clear sounding with simple to moderately complex music. Acoustic and pedal steel guitars sound especially nice. Just listened to a couple albums by Neko Case and by the Avett Brothers, all sound very good. Also simple live albums like Curtis Mayfield's Curtis/Live! sound amazing. I do notice a slight midrange horn coloration on a lot of vocals, a slight resonance like one might hear if one is speaking into a tin can. It's slight, but it starts to bug me after a while. Highs are smooth and sweet. Bass has good tone but is less powerful than I expected, a bit blunted, although some of that could be my room acoustics. Overall the tonal balance is a bit leaner than I like. My biggest complaint is that when the music gets more complex, it sounds smeared and congested to me, especially from bass to mids. It's not music I consider very demanding, stuff like indie rock, 70's power pop/pop rock. Maybe this is a reflection of deficiencies in the XA-25, I don't know, since the Forte III is often recommended as a good rock speaker. The Fortes in this setup definitely reveal bad recordings to be nothing but bad. If it's dull or grainy or compressed, you hear it. I'll continue listening for a few weeks more, but I'm not sure at this point that the Fortes will stay. Not sure about the Pass gear either. Maybe I need to try different amplification with the Fortes. I also haven't used the tube preamp yet. Thanks to all who commented earlier.