A65 I like my GS45. Works well and is powerful and very quiet. You will like it.

As for the original poster. Of the 3 I would buy the EVO. I hear lots of good things about them. Have you considered a Thunder Tiger 46 Pro? they are supposed to be a very good engine at a very good price. If price is not an object I would buy an Irvine. I have 2 53's and am completely satisfied with them. Good luck with whichever you choose.

Mark Shuman