anyone have any experience with these? i'm currently running maxxis IT's and think they're great as far as strenghth, durability,and especially shine on wet rock. overall traction is good but less than acceptable in real muddy conditions. i was wondering if the metzlers were as tough a carcass as the maxxis? i hear they are way better in mud..i weigh 290 and ride fast so strength is a big issue.. indy just put a terraflex on his but i think thats too much for me, he said it weighed 20 lbs!!!! also was wondering about the maxxis sur cross or 6001 anyone use them?