I agree with Emily... I've tried the VX (and I was very entusiastic vewing the site and the features) but after the trial I'm not so sure...
Yes, the RTP are good, but they are a little poor, and the tileset are too squared... And there are a lot of useful scripts and resources for XP that I'm afraid to leave...
So I think I'll finish my game with the XP and maybe I'll start a new project with the VX but... not so soon!
PS: This is my first post, so hello to everybody and forgive my English 'cause it's not my language!