I've got 255/60R18 Wrangler HP's on my VX (these are OE on new Range Rovers). Definitely look better than the OE tires, a bit taller and wider (more like what the OE size should have been), they have an aggresive shoulder design, and are suited more for both on and off-road (good compromise). Handling is comparable to OE, even though taller. Acceleration might be hindered very slightly.
Mike Skurich
1969 C3 Corvette Coupe
1988 C4 Corvette Coupe
1992 Misubishi 3000GT VR4
1997 BMW F650ST
2001 VehiCROSS
2002 BMW R1100S
2005 C6 Corvette Coupe