Excellent, man! I just recently bought the same gun. I also bought a non-threaded barrel for it and just got the sights replaced with non-suppressor height sights. Mine is the V7, but I'm looking to get the parts to convert back and forth between V7 and V1.
I just flat out love this platform. Now that I've got the new sights installed, I'm going to go out this weekend and test the difference in point of impact if there's any significant difference at all. I plan to report back once I know.
I would suggest getting a non-threaded barrel when you can, because with that and the eight round mags the gun goes down to a very concealable platform. I love being able to take the gun down that small to conceal during the day (even though my state is open carry, I still like not spooking anybody). But I work night shift and am out and about very often after midnight, so being able to throw the light and threaded barrel with a comp on it and wear my larger kydex holster is very comforting.
But, take heed. What others have told you is true. This won't be your last HK. I'm already looking at a USP45 Compact at my local gun store, and I've only had the HK45CT for a couple of months! Lol.