For strikers, S&W M&P9, Glock 19 or HK VP9.
For DA/SA Sig P-229 or HK P-30. I've had both but prefer the P-30 as it fits my hand better. It has grip panels that can be changed.
Whatever you buy put it in your hand first to see how it feels.
I wouldn't buy anything right now if you couldn't compare those side by side at your LGS. Another thought is hit a gun range and rent whatever you're interested in. My local range doesn't have any HK's because they aren't yugely popular in the US.