Had a tuned Evo 6 Tommi Mak, was awesome fun.

They ARE expensive to run, but if you are use to spending money maintaining a cossie it wont be much different to that. They are pants on fuel too.

Make sure its been undersealed if its an import too as they can rust badly if not done.

There are common problems but nothing too drastic.

the MLR is a great resource for info