I'm in the same boat...
I am about the pull the trigger on a P-07 and I'm still debating between the Black/No night sights vs the Grey w/ Suppressor Night sights.
I REALLY like the Grey. The threaded barrel is nice (but not a requirement for me). I like night sights, but just wish they weren't suppressor height (yes, I know why they are, just not needed for me).
But for $20 more than the Black version, you do get night sights, threaded barrel and the grey color. If I got the black one, I'd end up spending $100 +/- for night sights anyway.
As far as holster, most custom holster manufactures will accommodate for suppressor sights if you tell them when you order. As far as Off The Shelf holsters, I guess it depends... Looking at my Safariland holsters, there seems to be a lot of room left between my front sights (standard sights) and the holster. It looks like it would accommodate suppressor height sights... but not 100% sure.