Have the SP version on my black car and just purchased another one in SP's group buy for my red car. It's BPU, but just in case I decide to go big.... Billet tensioners from either source should be on all APU cars, IMO.
New Update: I decided to get one for my car. I ordered the SP one in there Group Buy about 10 minutes ago. I figure with the HP that I have and the Rev limiter set to 9000. It would be a Safe bet to get one of these.
I would highly recommend either one - they are both great units and accomplish the same goal: to keep you from having a possibly expensive situation (for you high-lift/duration cam guys that may have interference should something break).
I've got both the BoostLogic Timing Belt Tensioner and the Crank Pulley on my car, and they've performed flawlessly. Just for facts, I'm 71mm single, 950's, and TH400, and do drag race my car on occasion, and put the tensioner and crank pulley under some stress that the factory units may not hold up to (have cracks in my old pulley, and my timing tensioner didn't look too good either).