If you had 10k to spend on tube amp?????

A used pair of Cary 211 AE monoblocks can be had for under your price point. These would be an excellent match with the 5A's. I use a pair with the 3A Sigs with excellent results.

For synergy ARC & Vandersteen, used $10,000 buys a lot of ARC

Hi,a used CAT jl2 sig,about 9000.00

If you are going to the 5A you need to look into the Aesthetics Atlas amp...its a tube/solid state hybrid with 400 watts at 4 Ohm's and has been enginered with input from Richard Vandersteen himself. It includes the inboard High Pass filters, is balanced and single ended and sounds fantastic...my dad is buying one for his Vandy Wood Quatro's.....its $8000 and plus you save on the high pass you need for the 5A so it actually will cost you around $7300 all told.
Audition if you can, its zero feedback...powerful and fills your face with a big ole' smile when you hear it!

Chad I thought you could not live with the vandersteen 5a's. Too dark and boxy remember. I am glad to see you woke up and smell the coffee. Bye the way your girlfriend look very nice. She have ant single friends???? I am in Michigan.