The advise your getting on this thread is very good. The Thiels are way better then the Vandies. There is no comparison. Unfortunately the amp you have will make the Thiels sound like wounded rinos. The Thiels require amps that give predigious amounts of current at 3 ohms. If you look at the specs on your amplifier you will note that the power at 8 ohms is not doubled at 4 ohms. This means its current limited. That current limitation will be heard on the Thiels. Unless you are willing to purchase a Krell or other super amp don't go to Thiels.
VANDERSTEENS vs. THIELS
Dear audiophiles, I'm getting ready to buy some new speakers after 25 years of using AR10pi's. I've narrowed my choices to Vandersteen's 2Ce, Thiels 2.3, magneplanar 1.6. Please give me your thoughts on reliability, accuracy, other comments. I will power them with Onkyo m-504 amp (150w/ch) and use rega phono and cartridge,some CD's on a Denon 370. Thanking you in advance hififile, (aka: Bennett).