Look, the parts are made in Belgium . . .
. . . do you really care if they're assembled in the monkey house at the zoo?
First of all, let me applaud your interest in the BHP. Wonderful pistols.
Okay. I've never understood the worries about the Portuguese-assembled guns. It's a real phenomenon, though - I was managing a gun store when the "Assembled in Portugal" guns came out. The old "100% Belgian" guns instantly commanded a premium, for some reason.
Metal work and quality worries, I understand, but the parts are still made where they always were. I'm not aware of any basis for believing that the Portuguese aren't capable of putting together a pistol properly (but, then, I'm a quarter Italian). And, the FN/Browning folks overseeing the process - they've got their name on the gun, and they're fully aware who's going to be defending the lawsuit if something goes wrong. Nothing to worry about!
FWIW, I've shot a few, and they were all wonderful. My main handgun nowadays is a Portuguese-assembled BHP in .40. The clones can be a real deal (check out info at the Hi-Power site dinosaur listed), but you might give up something on fit/finish/trigger pull. The Hi-Powers are quality pistols; that's why they cost so much. You won't regret purchasing one that was put together in Portugal, but go for the all-Belgian if it troubles you. Either way, you will like your Hi-Power a lot.