I've just had 4 215/40/17 Toyo Proxes T1-R fitted.
I've only done about 25 miles on them so will post a better review in time.
First impressions are that they definatly ride better than the Michelin runflats, they seem to 'thump' over bumps rather than 'crash' over them. I can't comment on the handling yet as it's wet here and they still need a few hundred miles to bed in. They look fine on the car, almost no different, from the rear they are ever so slightly wider (10mm in fact).
Here's a quick pic to illustrate the difference in the two tyre sizes

(apologies for the filthy car, I will wash it when it stops raining!)
So in summary, happy so far!
Also... if anyone is after some nearly new runflats I have 2
for sale in the classifieds