Thanks for the replies ! Meanwhile, I've made up my mind - it will be a Wilkinson, since I only want a sturdy, reliable trem (and besides, I already have enough Floyd guitars lying around).
The standard trem on an OLP is called a "vintage trem", I believe - the type with 6 screws. Which Wilkinson would fit, and how much of a hassle is it to install it (drop-in replacement would be perfect) ? I had already planned on Sperzel locking tuners and a graphite nut, BTW...
Again, thanks for the support !