BaiHU, if you shoot the Glock better than the P30/VP9 pistols and want to still run an HK try the USP. I found that the USP shoots very well for me but I cannot shoot a P30 to say my life. I have never had success with pistols with real curvy grips. The USP has flat sides like a Glock although the grip angle is on the opposite side of the spectrum. The USP also has a better trigger than the P30 that breaks further out.