You shouldnt buy anything in that price range without listening/demoing with a purpose. You should, however, go listen to alot of different gear.
Where do you live? Are there dealers near? Make appointments. Decide if you are set on your speakers, if not, figure out what you want. Then determine appropriate electronics. I love, absolutely love, the ref75se. The ref75se will not be performing at its best with your vandys. I also have great appreciation for the pass xa series. My experience owning the 30.5 years ago was it was sloppy in the lower bass. The .8 series is better with bass. Im not terribly fond of pass preamps.
OR
If you dont want to spend a little time and money to go and determine what you want, then by all means buy whatever you want.