As Syntyr mentioned they recently (within the last 6-8 months) released extended mags for the P30sk/VP9sk in both 13 and 15-round varieties. Prior to this I was carrying with the flush fit 10-round mag and carried a spare 15-round P30 mag. It left a gap in the grip, but at the time was the best option. Now the factory spacers make for a nice full grip with no gap with both mag options. With the 13-round mag you end up with a grip that is about 1/2" shorter than the full size P30 (this is how I typically carry) but that give you more than enough real estate for a good shooting grip. When you're ready to head to the range pick up a few of the 15-round mags with the factory grip extension and you have the best of both worlds.
As I mentioned its all about the fit in my hand. The gun(s) just feel right. That said, the finger groove positioning isn't for everyone. I know a lot of folks that it just doesn't work for. If that's the case, take a look at the P2000 and the P2000sk. The P2000sk has been well liked for a long time and still holds it's own today. If I wasn't in love with the P30 series I would probably be shooting/carrying a P2000 variant. If I ever stumble across a deal one day I may still pick one up, just haven't seen that deal yet.
Lastly, there's the USP. I've you've never shot one, imagine holding a 2x4 as the grip.
Ok, maybe not that bad, but man the ergonomics on that gun just don't work for me. That said, I absolutely cannot argue with the reliability and robustness of the USP series. They're tough as nails and fit and finish is awesome. In your case, sounds like you're mostly a striker fired guy. With that in mind I would point you towards the VP9sk to do just what I've done above with the extended mags. Carry and range gun all-in-one.