Von Schweikert 3.5's and tubes?

I just picked up these speakers and I'm powering them with a P.S Audio hca-2. I was just wondering if these speakers would sound better with a tube amp. I posted a thread earlier about bi-amping with tubes for the mid/highs and keeping the P.S Audio for the bass. Too much work for little or no return. How about selling the hca-2 and investing in a good tube amp? I'm not saying it doesn't sound great now. I just got the bug and I am always looking for....hell, I dont know. Anyways thanks for listening and any advise on amps (tube or ss) would be great.