So, RE050s again would be fine, but I found some RE040s in VX220 spec and figured they would be as near as damnit to what Lotus intended and so I have ordered a pair. £198 delivered, from Camskill.
A lot better than shelling out £360 for a pair of YOKOs that don't even match the fronts, methinks.
I have fitted RE50's to my Exige very recently. The only problem i have had is they understeer more than the AD08's i had on it, but i guess thats safer in the slippy conditions then bucket loads of opposite lock and a lack of talent Maybe get some 888's for the summer(and a few track sessions).
The only problem i had was they did not do the in the same size as my front AD08's so had to get a lower profile tyre, so the nose is a bit lower(and thus taking speed bumps even slower then normal).