I've got a set of ACS wheel locks that I think are made by Maguard (or however you spell it) and the key is stripped and no longer fits over the bolts. So i figure I should get a new set....

Are the OEM BMW wheel locks any good? How much do those run?

I have the OE wheels locks and an aftermarket set (yes, that means that I'm running two different wheel locks on every wheel). It makes me feel safe.

PS: the OE wheel locks look very cool with the caps on them.

But are the OE wheel locks good and reliable?

All wheel locks can be defeated with some time. It's only for slowing them down or detering the rookies. The OEM ones are not bad and are fairly inexpensive.

where do you guys buy them? im looking for a set of locks myself. i called up the stealership for shits and giggles to ask how much they wanted for just lug studs. they said 13 a piece lmao. so i didn't even bother asking about the locks.

mcgard suck! after stripping two keys i went with the bavarian autosport locks. love 'em

All wheel locks can be defeated with some time. It's only for slowing them down or detering the rookies. The OEM ones are not bad and are fairly inexpensive.
As far as what the wheel shops told me, the OEM are the safest ones.

are the "gorilla" brand wheel locks any good? I have a connection to grab a set for 12 bucks. Lugs nuts for $1 each.