I have Super Sports on the front of mine...and will probably put them on the back for a matching set when my rears wear out (a bit of a mixed bag right now due to a blown tire on I-215...but that's another story)...of course if I keep my car that long.
I will say they're nice and quiet, grip like no other, but are a bit on the expensive side.
I can't really compare to others though as the only thing I've run on there have been the stock run flats and the vred ultrac sessanta. Those are about as inexpensive low profile tire as you can get...but they do a pretty good job overall for the price.
08 335i e90 TiAg/Black, Premium, Sport, Step, Cold Weather, BMW Perf. shifter/e-brake, M3 lip spoiler, blacklines, aFe intake, VMR 710s, Gloss black vinyl trim, black 3.5" DiMisa tips, Procede V5, ar Design OCC, ETS 5" intercooler (black), MTech wheel, rear bumper, and side skirts, Stett CP, Forge DVs, LUX 5.1, Ground Control Coil-overs, OEM split armrest, Raceland catless DPs, BIM Coded...