YES YES get the 528i, leave the 535i aloneeeeeeeeeeeeeee. haha...
Seriously, i gather that if you can spend on a 2012 528i, then you can afford a parallel imported Msport 535i 2011 model (Specs i think MUST HAVE for the F10: HUD,6NR BMW Apps,Adaptive Headlights,Surround View, Power boot,6WA black panel,Adaptive Drive) much higher specs than what you can get from AB.
I am not sure what kind of driver are you, but for me, a no brainer inline 6 vs 4. When mated with the 8 speed gear box, it sure felt a lot faster than my E92 335 ...and of course, mods are already planned and on its way to make this whale the Moby Dick on road !
screw the AB warranty and shit, you paid a lot more and get a lot less. thinking your car is in good hands with AB ( their SA are all quite bad, you can read many members experience here). You can extend your warranty now with 3rd party insurers like OPAL, for the peace of mind.
There are many in the market since this year so don't worry as not to find any unit to test.Take your time (i took almost six months considering all Audi/Evoque/BMW), Insist on getting to know the origins of the car, call UK to check on the mileage claimed and also the VIN to double confirm the specs.Once you have picked your unit, bring it to your trust worthy mechanic to check on any signs of accidents, defects ,etc. Go to the bank, pray they approve your loan and sign on the dotted lines =)
and most importantly, of all colour, DONT CHOOSE ALPINE WHITE, it is damn ugly. heheheh... and also because mine is in Alpine White too.