Not sure what cost difference between HK45 and HK45C are, but my dealer told me the 45C was going to cost me $891. I decided to get the USP Compact in .45 instead because it's smaller and was $738. But then again, after trying to source magazines ($65-$75@), I might just cancel the order. I was hoping it would be in the $30-$33 range that I paid for all my P2000 .357 magazines.
Maybe a .45 just isn't for me. Or not a .45 HK since magazine prices are outrageous.