All vandersteen users ?

The Quatro VK-55 mono blocks would be a fantastic combo!!! If you can do this do it and forget playing around, you would have to add a pair of 2Wq sub and all the associated equipment to come close. I had 3A Sig's, a pair of 2Wq's, M5-HP filters etc. etc. I drove this with Pass X-150 (pre- subs), Quicksilver V-4's and ARC VS-115 (could have used a pair of ARC VS-55 like Vandersteen did at shows with Quatro's) With the 2Ce Sigs2 and no subs I think you need min 120 tube watts per channel to get punch in the low end.

Go to the Vandersteen website then to the Quarto wood page and view the Qutro's and ARC VS-55 at a show!!! My Vandersteen dealer drove his home set of 5A's with VS-55 mono blocks. The Quatro and 5A's have their own internal bass amps driving the woofers (As Ecruz stated), you may personally like more power but it isn't "necessary". The SPL that you listen at may be a factor, if you can afford 100 +wpc mono blocks go for it they'll be great but if your looking at a reasonable output of cash with high return the 55's are the call. I think something to keep in mind is I don't have a horse in the race like the dealer may, something I have to remind myself of constantly when I'm speaking with a dealer!!

Everyone says make sure your amp(s) is(are) compatible. The two speakers seem to be opposites! The GV have loads of inner detail and are bass shy, the Quatro has mucho bass but not the inner detail of the GV. Personally if I had to choose I'd take the GV's.