Good choice. I like the look of the 925.
Just for reference - this is the noise a new singlespeed should make - or even an old one that's properly set and maintained. Ready? Here goes, ................................................................... That's it. The wind in your hair should be the loudest thing.
Stock bikes, assembled with air-driven tools on an Asian production line at high speed, are normally very good, but will lack the finesse of hand-assembly. It's the careful detail in putting a bike together that results in a sweet ride. I'd suggest a total strip and careful re-assembly of any new stock bike, just to be sure that everything is properly lubed, torqued, adjusted and seated. This is a doddle with a singlespeed, and shouldn't take more than an hour. This way the bike will run silent and smooth, just like an expensive one-off custom build, and you'll have the peace of mind that it's all set correctly and running with maximum efficiency.
STEAL WON!