If you've got room for floorstanders try the Jamo D450's, I currently run them with the EE M520...I also have used Reference 3A de Capo i's ($1k-1400 used) and an older speaker, if you can find them are Dayton Wright LCM-1's (probably $600-700 used).
The M520 is quite an integrated (even better if you can put a preamp in front of it) once you get ride of the Chinese tubes...I've been living with one for almost 2 years now (in the main listening room) and I haven't had one last anywhere near that long previously. The only integrated that I've tried that even comes close to it is the Nelson Image 66i which uses KT-66's, but doesn't have a remote option or tape out, so the wife nixes its use in the main room.
Good luck, and take your time, the journey is part of the fun with speakers.
L'wood