A pair of ProAc 2.5's replaced my Vandersteen's in my listening room years ago. "Warmer, smoother and generally more musical" is an interesting way to post the question, but to me the question that most conveys the difference is "which speaker best puts the performance into your listening space". With that in mind, the ProAcs win hands down. If your electronics are not of high quality, the Vandersteens do a great job of hiding shortcomings but if you have the electronics---the ProAcs are keepers!
