@rawchuck,
Though I am a bit of a Klipsch "fanboy", I do appreciate great sound and many other mfr’s can do it right.
With that said, a Marantz 2270 or 2275 will mate very well with a pair of Heresys. Though not technically(height wise) floorstanders, Heresys offer a very efficient, dynamic, and punchy presentation that mates well with 25w tube amps as well as 200w/ch SS amps. I drove a pair of Heresy I’s and Quartets for quite some time with a Marantz 2252B and the combinations were wonderful. The 70’s Marantz are on the "warmish" side of neutral that tames the often described "brittleness" or "strident" treble that IMO Klipsch doesn’t fully deserve. I now drive my Heresy I’s and and Heresy II’s with NAD and Cambridge Audio.
As far as vintage Klipsch floorstanders, look also at Quartets, forte’s II’s, and Chorus I & II’s. Your budget of $2500.00 is plenty big to find a very nice all vintage rig that will bring you tons of enjoyment.
Head over to the Klipsch forum where there is gobs of knowledge about this genre and quite a few things for sale that might catch your eye.
https://community.klipsch.com/index.php?/forum/63-garage-sale/&;
Just reread and noticed you mentioning new gear with vintage looks. The Yamaha A-S1000, 2000, 1100, and 2100 integrateds definitely fit that category but may blow your budget a bit if you opt for models that have the cool retro meters(1100, 2100, 3000).
Bill