I'm right hand and left eye dominate. I shoot best with both eyes open with my main focus on my target. When you get used to it, the bullets just kinda go where you want.
No need for suppressor sights for target shooting either. If you can line them up, the bullets going to hit where you aim. You cover the target with an HK anyway so if your aiming right, you wouldn't see it anyway unless it was a BIG target.
Also I bought the HK45C and converted it to a CT just recently.
The barrel and night sights cost me almost what I paid for the used HK45C. That said, my local shop has $1060.00 on a new HK45C, $1189.00 on a CT. Much better off to get a whole CT if buying new. My CT barrel was $269.00 from HK Speciality Parts (Gorden Miller) and that was the lowest price I found, in-stock.
Even the Meprolight made factory sights will run you $100~130.00, Trijicon HD's will cost you $160.00 or so.
You would be better off to buy the CT package, buy the HD sights and then sell the factory night sights. Hell, I would buy them for my P30! Used factory night sights sell for around $60~75.00 depending if your smith can get them off without pounding them and jacking them up! If your smith uses a sight press, your good to go!