I would like SAO but a DA/SA would be fine as long as I can get a good trigger from it.An old-school Hi Power *with* a threaded barrel will cost some serious coin, assuming you can even find one. Same goes for the new High Power. Same goes for the variants.
A CZ 75 variant makes a lot of sense. Some models of the P-01 used to come with threaded barrels as standard (as recently as late last year), but it looks like none of the current range does, but there might be some NOS out there. While the P-01 is technically a compact, you're losing just 2 rounds in the mag and a tad over 1/2" in barrel length, IIRC.
Beretta has been mentioned; a solid pick. And the Sig P226/P229 models are still an option.
You probably need to figure out if you want DA/SA or SA, because nowadays, that decision will also restrict your choices.

