I'm with Sith33. I've got AD08's on the rear. I don't know what the differences are between the 07's and 08's but I don't notice an issue. And your driving situation is similar to mine. Not cheap though. I replaced the 2 rears with 08's from Tire Rack for $750.
'05 Elise #557, CO, Touring & Sport pack, both tops, B&M short shift, itg Maxogen intake, Racing harness bar, RTD2 brace, Fire Extinguisher, CF console, Battery extender, Lidbone, Bootie
'61 Land Rover Series II 109 3 door--sold
'66 TR-4A IRS--sold
'71 Porsche 914/4--sold