The more I think about this, I think what Don suggested about using a separate pre/power combo is probably going to be your best bet. Far more options that will allow for greater flexibility when setting your system up. If you research the web about the 3.6, the opinions on amplification seem to be pretty consistent: they need power/current to sound their best. This typically leads one down the path of solid state amps. The problem is, the 3.6 has somewhat of a forward presentation that can sound cold, hard and sterile with many solid state amps. And this is why many people want to mate this speaker brand with tubes. This is a great idea! But if you read what those who have mated them with tube amps often say...they sound musical, but they lack output and control in the bass region. So, many people who drive them with a tube amp end up with an expensive unit for the power. Not only are these amps inherently a lot of money, re-tubing them can be quite expensive as well. My ultimate suggestion would be to look for a solid state amp that has a "warm" sonic signature but will still have the power to drive them appropriately and get the best bass performance from them. When I think "warm" solid state, two brands immediately come to mind: 1. Conrad-Johnson 2. Classé I'd then pair an amp from one of these two manufacturers with a tubed preamp. You can acquire a used amp from either one of these companies for under $1,500. A new tube preamp can be purchased for around $1,000 (Quicksilver Line Preamplifier). This will allow you to inject plenty of warmth into a system that would be driving them. Hell, given your budget...I'd buy a used amp from BOTH of those companies and then resell one of them (assuming one of them suited your needs of course). That's what I would do - but I am comfortable buying used audio equipment. Food for thought!