I'm looking forward to the HK45 more, personally...
I'm waiting impatiently for the HK45c, but the size and weight put me off a bit. (25.28 oz., 7.2"L x 5.6"H x 1.4"W), which is bigger all around than the HK USPc 45 (28.2 oz, 7.1"L x 5.1"H x 1.1"W).
(For reference, the P99c is 18.1 oz, 6.6"L x 4.3"H x 1.3"W and the HK P2000SK is 22.4 oz., 6.4"L x 4.6"H x 1.3"W.)
Shot my P99c next to an HK USP Compact 45ACP and a Glock 33 (357 Sig) on Sunday.
The P99c is an excellent shooter... after having the P99c only a few months,
I actually got rid of my long time buddy, a SW 5906 I bought in 1988.
The HK USPc 45 is a nice shoot, so I expect the same from the HK45.
I also recall shooting a G30 or G36 (both 45ACP) a few months ago, and it was fine. I'm not a Glock man, and I hate the mag release. The G33 was a nice shoot, except for the mag release.
I think the P99c stacks up well to the HK for quality and as I saw recently elsewhere, 100% reliable is 100%, and anything else means you can't count on it for your safety. HK warranty is for the lifetime of the original purchaser.
I'd really like a P99c in 357 Sig, so I'm planning on a HK P2000SK. Less wrist pain than with the .40, and faster reacquisition of target for me.