I'd just get a fron hope xc, not expensive, you could always go to a bulb if you have the money, or a new pro 2. i've been running an XC on my trials rig for a time and have had no problems what so ever. Plus you can just get the sme colour front to match the back you already have - winner ! As for a front brake I'd recommend a hydro, like a hope mini would do, how about one of the new hope moto's with the funky rotor. Nice and powerful i'd imagine. I hear that Avid's Juicie 7 is a fav with some riders too. Personally i wouldnt bother with a cable disc, but the choice is yours!