I was just gonna post a similar question as I think i'm reaching the comfort level of an upgrade.

Have you tried Knife edge with your 4*? You should! I do about 5-6 knife edges each flight and it's does a great knife edge. I'll try to post a vid of it sometimes when I can get a cameraman out there.

The snap rolls are awesome with it, especially when you're in a 45deg climb, snap it and then continue your 45deg climb... it does that pretty well.

I love the 4* but I want something a bit more capable now. I've come to realize that I'm more of a 3-D freestyle pilot rather than a precise pattern flyer. That's not for me.

I already fly a MiniEdge 540 and it's a blast. It's a little heavy but still pretty acrobatic and I'm currently building a [link=http://www.rcgroups.com/forums/showthread.php?t=390003]Nasty[/link]

I'm looking forward to suggestions in this thread.