Try-all front and rear. :P
Well, not that necesary for the front, but essential for the rear; better grip in wet and dry conditions, dispurts mud, better sidewall grip for sidehops, thicker sidewalls to stop gay pinches, 40a(slow reezay) compound.
Only a little heavier(something 100g?), but that means thicker sidewalls, which are almost double the Maxxis uns, but not quite highroller/minion sidewalls( 2 ply).
About the same price now as well (Y)
Just they wear a little quicker, but it being an ACE tyre cancelles that out!
Tlk to ye on MSN to pursuade ye Mark :P