Take a look at the Mernickle Extreme Hi XHR.
As many have said, the belt is an essential part of keeping a hi/tight holster close.
Galco is low to medium quality, low durability leather for the masses, and very overpriced.
I have no connection but have worn a hi/tight Mernickle every day all day for about 4 (or 5?) years now and it's as good as the day I got it. Sparks sets a high standard and Grizzle is outstanding as well. Andrews leather is top notch.
Worst case scenario... buy a "bang for the buck" Mernickle while you wait 6 months to a year + for a Sparks or Andrews.
Make sure you have the shoulder mobility to unholster a very hi placed gun without contortion
45 degree seems like an awful lot to me but it WILL raise the bottom of the holster. Wrist angle be damned.
Lots of lightly used, high quality holsters on the ebay, if you want to do a test run of that style.