SPIKE--- In consideraton of the parameters you indicated, I highly recommend the following tire:
"FIERCE ST" in 285/60R18 (31.3" O.D./40 lbs) which sells for only $82.25 each (yes, Eighty-Two dollars and Twenty-Five cents) at www.OnlineTires.com. The Fierce ST is an exact "clone" to the much more expensive Toyo - Proxes S/T II.
Check-out the factory website at www.FierceTires.com. You can read recent customer outstanding reviews of this specific tire at www.Treadepot.com.
The Cooper - Zeon "LTZ" (31.3" O.D./49 lbs); like on VX-KAT is an awesome tire, but may be a bit "overkill" based upon your driving style and very limited off-road excursions.
If you still prefer a true A/T tire like the "LTZ", then please also consider the PRO-COMP - All Terrain in 285/60R18 (31.3" O.D./43 lbs). The Pro-Comp A/T is Snowflake/Mountain rated, has a 50K mileage warranty and is currently on sale at www.4WheelParts.com for a "Buy 3, Get The 4th Free" tire special. Check with fellow VX member "BoarderCross2000" who just installed a set on his VX from this exact sale offer.
Above all; check-out the "FIERCE S/T" in 285/60R18, as it just might meet all of your requirements at a super awesome price!!!