Ayre is a very popular choice. That's what I use. A V-5 and a K-5 would be hard to beat. But you should still listen to them first. Just because I like them doesn't you'll feel the same way. Aesthetix is a good choice if you want to use tubes.
amp for vandersteen Quatro maybe vandersteen 5a
After listening to v. Quatro have decide to go with this speaker. Need help on choosing amp and pre amp.Thanks