Hmmm, a few ones I agree with ( or have heard at least ) so far...
Anyway, here's what I think:
1)Yes-Close To The Edge (Actually, this is as metal as rock can get I think...)
2)Porcupine Tree-Trains
3)Anekdoten-Karelia
4)Anekdoten-The Old Man and The Sea
5)Don Caballero- Slice Where you Live Like Pie
Actually, this is quite a tough decision. I listen to as much non-metal as I listen to metal these days...But I don't actually like either better than the other. Good music is good music to me...Though I never thought I see the day when I listened to as much or more of prog/rock than metal...