I use Michellin Pilot Sport: Front 235/50ZR18, Rear 255/45ZR18 (directional tires)
- Performance in dry = Excellent; Rain = EXCELLENT (it rains a LOT and HEAVY here); Snow = N/A (it NEVER snow here!)
- Thread Life = done 18K Km only, still got long way to go
- Price = I forgot. but I think it was about US$200+
- Noise = slightly louder than the stock (Michellin Pilot HX), but I think it's more to do with from 17" to 18" rims; the sport exhaust and my music is way louder anyway!
- Ride comfort = I'm used to stiff rides. Gave up my Lexus RX for the X3.

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Here's the Photo Album of my (sold) X3; Album of my (newish) X5 is on the way!
(WARNING: read this before you buy anything from Umnitza)