I think the only on you would have to worry about a headlight with would be the W.E.R. as it attaches to the frame and mounts on top of the front fender. I think that you have to buy a re-mounting kit or cut up you head light plastic. The other to mount on top of the bars so they don't interfer with the headlight.
I think any one would work great, but I would preferer the scotts for the ease of adjustment and the fact that is does not dampen agaist turning. I think the GPR and WER do, but I hear most say its realy not much of a factor.
I think scotts does make a forward mount like the WER, but the only model I've seen it on is a CRF450. That would also require some headlight modification, but you can order it in the standard configuaration.
Happy shopping :yeehaw: