After talking with Marty @ raxles.com, he said that (in the US) an integra GS-R axle is preferable over a b16a2 because its a 32 spline shaft, with the b16 being a 30 spline. The importance of this is that when a drive shaft gets twice as wide it gets 4 times as strong, so a 32 spline shaft is superior to a 30 spline. If you get an axle, I wouldnt recommend an auto shop rebuild, they may come with a lifetime warrantee but sometimes you get a good one, sometimes a bad one. A brand new axle would be better than a rebuild. I personally just skipped a potential reliability hassle and got raxles.