It's about time for a new top end on my bike (2005 KX250). I've been using Vertex pistons in my last couple of bikes with great results, but I think that company may no longer be around, I checked a couple of places I have bought them from in the past and they do not carry them. So my question is do you guys prefer something like a stock/ProX piston or Wiseco, and why? I have heard enough love/hate with Wiseco to be hesitant to put one in my bike. I have heard, noisier than stock, too lose fit, cold seize if not warmed up thoroughly, does not last as long as stock. But yet, other people love them. So anyway let me know what you guys/girls suggest. Thanks!