To be honest, the urbans are probably your best bet on a budget. pretty strong, lightweight and reasonably priced.
I run trialtechs, their only drawback being their length, and a few of my mates have the rockman spade's which seem to be holding up really well and have a geo far better suited to most natural frames.
The orange forks are very short with a long rake I think?
The SL's wouldn't be a good call i don't think. Not very strong at all.
Straight blades and curved both end up being the same geometry, the rake and length is usually the same.