tubed pre for vandersteen 3a sig's

Just purchased a pair of Vandersteen 3a Signatures. Wanting to preserve 2 channel sound, I would like a tubed preamp ($2k and under) with a theater pass thru. Initially, I will use an Innersound two channel amp for the Vandie's. Would also like amp recommendations in case the Innersound does not work out.

Your thoughts and recommendations will be most appreciated.