My current setup is the Pirelli Scorpian in the front and the Pirelli MT43 in back. I like it, both tires are wearing quite well, ( I need to check how many miles I have on them but I think it's close to 1000.) The MT 43 trials tire has provided great traction in all conditions so far. I haven't really had it in mud yet but in sand and rocks, it's great. The Scorpian seems to hold corners well any is barely showing any wear. I'm running Tubliss front and rear.
'03 KTM 450EXC
"If you know what you're doing, then you aren't learning anything." - A. Lincoln