I agree that your current amp should be fine. The Vandersteen's as a whole do require power. I'm currently using a Belles 350A (250/ch @ 8 ohms) I have never felt the amp was remotely stressed for loud levels. I did use McCormack .5's back a while (rated at 100/ch) Thought they did fine but honestly didn't sound as refined and powerful as the Belles.
As a passing note, I can't agree at all with the sameness statement of the above gentleman. I have found an improvement as you go up the line although it is a less of one between the 3A and 2Ce Signature. The 3A Signature IS a jump above these two. The 3A Signature uses the Model 5 tweeter and midrange. This is a quantified improvement in drivers over the 3A and below and it shows in its performance. Also, when speakers and/or drivers are utilized correctly from the beginning, there is no need to bring out a new improvement every year. Vandersteen upgrades when genuine improvements come along.
As a passing note, I can't agree at all with the sameness statement of the above gentleman. I have found an improvement as you go up the line although it is a less of one between the 3A and 2Ce Signature. The 3A Signature IS a jump above these two. The 3A Signature uses the Model 5 tweeter and midrange. This is a quantified improvement in drivers over the 3A and below and it shows in its performance. Also, when speakers and/or drivers are utilized correctly from the beginning, there is no need to bring out a new improvement every year. Vandersteen upgrades when genuine improvements come along.