Custom is nice, you can have the builder work the bugs out, and if he's local (as yours is) you have the ability to take it to his directly for any issues.
Trojan is supposed to be nice, I see a bunch of them at matches here in California (and for what you have to do to get one here, they must be nice if there are as many as I see), and they seem to work well.
Good luck whichever way you choose to go. I think you'll love the .40, I know I prefer my home made, unpainted (fixing that soon), ex-Kimber version to my .45, and the .45 is a Les Baer.
Tripp Research mags are nice, and hold nine rounds. No more expensive than any others. I also have Mec Gar, Check Mate and a modified Wilson Combat. All work well, the Wilson Combat used to hold nine rounds, but the spacer and Trip Research follower changed that. But it works now (which makes shooting it more fun), and SS only allows eight after the initial Barney mag, so it's no loss.
The Tripps, Check Mate and Wilson Combat were easiest to adjust after installing the EGW Higher Mag Catch, plastic base plate only requires utility knife to trim, steel tab on front of the others (they're more traditional 1911 type mags, steel base plate, welded on with tab sticking out in front) requires a Dremel or file and elbow grease to adjust. Not too big as deal, but way more work than plastic.