Coincidentally, I just put a post about how my Forte IVs sound amazing with my Luxman 505Uxii and 507Z however, the 590axII (I think that’s the right model number) is class A and I bet it would be amazing with your Klipsch. The tone controls are also amazing on these integrated, so would allow you a little tweaking if necessary, or you can disable and go line straight.
I had a Decware integrated, 6 watt on the Forte IVs, but the Luxman blew it away