Honestly I think OEM coils are fine for anybody on stock turbo's. Upgraded turbo's it sort of depends on the situation. If you never drive the car and keep everything perfect I think you can get away with OEM just fine still if you want to, but you do give up some power in the midrange.
No idea why coil upgrades cause issues for the guys at BMS, they always claim phantom timing corrections with them. It's not been my experience tuning people on JB4 with BL or PR, but it's whatever. I'm also not sure how their cars have not had as many coil failure issues as most people do at high power on the factory ignition, maybe they don't drive the development cars as much anymore? I know mine would eat one every 15-20k miles and I felt stupid having to keep a spare in the trunk. I guess maybe the Eldors are more sturdy, maybe MSD80 cooks coils and injectors, but on the bench Eldor failed just as fast as Bosch and Delphi. Bench isn't real world, and I've had my PR for like 4 years now as I gave up on the factory ones before Eldors were even on the market, so I dunno.
For gap, I recommend 0.022" for everybody for the most part. If you are making over 600hp I recommend smaller like .018" or .020" if you have factory coils and drive the car as a daily. If you have upgraded coils and really want to, 0.024" is fine, but there's not any evidence I've seen for power gains going over 0.022". BL and PR cars I've been associated with always pick up midrange power and run smoother, regardless of gap, but of course factory are proven to support tons of power as well if done right so it's up to the person where they want to spend money. Aftermarket coils aren't without their negatives (finicky PR wire installs, R8 coil failures, etc). The facebook war on coils is just stupid.
