Amp recommendations...

Looking for recommendations to drive a pair of Vandersteen fours. I already own a Levinson 28 preamp. Need lots of bass and midrange. Budget is <3k. Been thinking about Classe ca300, Krell KSA, Levinson 333, Rowland Model 2, Pass Labs X250. Anything else?

Also, At what age do most older amps need to be recapped and cost?