ecramer,
I think that each of the amps you listed may be a bit underpowered for the Vandy 3A's, unless you don't plan to play them very loudly. In my experience Vandy's match very well with Quicksilver and Audio Research tube amplifiers.
I always have relied on John Rutan (Audio Connection - Verona, NJ) for recommendations on matching amps to Vandersteen speakers. He is extremely knowledgable and one of Richard Vandersteen's valued dealers. I would give him a call if you can.
This info from the Vandersteen website on 3a Signature speakers:
• IMPEDANCE
6 ohms nominal 4 ohms minimum.
• SENSITIVITY
87dB with 2.83 volts of pink noise input at 1 meter on axis.
• RECOMMENDED AMPLIFICATION
100 to 200 watts per channel into 8 ohms.
The amplifier must be stable into a 4 ohm load.
NB