sell the quaife -someone will bite your hand off for it. Plus the BE diffs are cheaper so you'll not lose money on it
I ran a BE without a lsd for 4-5 months and it was a lot of fun (although ovbiously span a fair bit). I know it's expensive but you'll have peace of mind. How much is that worth to you?
I've broken a BE box (well, it started to make some fairly horrible noises before we swapped it for another) and Colin's broke one on the dyno. To my knowledge other people haven't though so we might just have had weak boxes for those. Titch drives like he stole it EVERYWHERE and smashes it through the box and his is bombproof - I'd really recommend it.