Another vote for GEN5. The GEN5 Glock 17/19 is available from the factory with Ameriglo BOLD sights installed. Probably one of the best 'out of the box' pistol combinations you can order. Search for PA1750303AB and PA1950303AB respectively.
I'll add that if you're a lefty, GEN5 is the significantly better option.
The 19X doesn't have the cut out (or magwell) but has the rest of the GEN5 goodness, so that's an option if you're willing to go with a 17 length grip. There are also the Pearce floorplates (PG-FML).