Just got some extra $ so i think i am going to buy all 4 sets of tires.

I've also been looking at Kumho Solus 716 HP4 (40k Warranty) (they sales clerk told me they replaced the Ecsta 716 HP4). I noticed that the Falken 512 (50k Warranty) are uni-directional tires. Will it wear out faster than Kumho's?