I'd probably get an RMR for one of my Glocks and try and talk Allen into putting me on the waiting list for him to cut the slide for it. Then buy a better safe, more ammo, etc. I'd be hard pressed to drop $2k on a single gun personally.
I finished my MBA in August and had that much saved as a graduation gift to myself. I wanted a 1911 and had been telling myself I would get a nice one the whole time I saved.
I have just left the money alone, although I do want a M&P shield. I guess I can't see spending that much on something I won't really "use" daily. Though, I have my first, nine month old AR still sitting in the closet unfired.