Our next vehicle will be an L322. With them dropping in price, I'm surprised the off-road gear hasn't picked up.
Comp-automotive 18's fit the Range Rover Full-Size (non-supercharged) and LR3 18's. I do NOT think standard 18" wheel will clear or have the proper offset/dimensions without spacers (like the Overland Journal/Expo LR4 build).
I've talked with Compautomotive and they believe their 18's will fit 2010 and up NON-Supercharged versions, but no one has purchased them to try yet (I was in correspondence with them when I was considering trading my truck in on a 2011 HSE). The brakes on the non-supercharged '10+ are too big for LR3 18's, but the calipers are still smaller than the Brembos and Compautomotive thinks they will fit.
It would be nice to see if someone tries.
With the 2" Johnson Rods you can actually get some Load Range E (thick side wall) tires for the 20" rims....these are better than having the 19's, and the 20" tires are cheaper than off-road tires for the 19's. This gives some flexibility if you can't afford expensive Compautomotive's from the get go..........not only that, but one has to wonder for how much longer Compautomotive will continue to offer the 18" Land Rover tire?
As far as the vehicle is concerned, I liked the L322 platform better than both the previous gen. Range Rover Sport and the LR4 (although those rigs were very nice too). It's a shame off-road goodies aren't available yet, as the L322 is an impressive vehicle, even in stock trim.