I appreciate the review, you summed up what takes a twenty minute video for a firearm reviewer.
I'm a fan of the USP and HK in general but the modularity of the SIG really has my interest peaked, I really need to find a loaner of both and see what's what. The VP9 and P320 are both similarly priced but the VP9 doesn't come in .357 SIG which is the caliber I would purchase the P320 in, I would have to go with .40 on the VP9.
I definitely like the more aggressive grip on the VP9 and the customizable backstrap is a huge bonus. The mag release wings are okay but I like the standard US location more.
I DO love the .40 S&W round, and it would have been a LOT easier on ammo inventory to not have yet ANOTHER caliber. However, I can get a brick of 9mm Blazer FMJ's for $100, about 2/3 of what I'm finding for .40's. I practice a LOT, because, ya know, it's FUN and I don't even have to leave my yard.