I personally think that the FNS-9 is one of the most underrated pistols out there. It's about G19 size, good sights, ambi everything, manual safety option, great texture, etc.
I have a standard, and while I didn't like the trigger pull initially, I got bored one day, detail stripped it, and stoned the contact spots. MUUUUCH better now. Easily as good as a Glock trigger. I do wish that the trigger had a blade safety instead of being hinged, but oh well.
It's a very solidly made gun, and I picked up 3 more mags from Western Sport (I think) when they were on sale for $30 or something. I've got six total now, and they're of very high quality. Carbon Arms makes a +6 extension. I kinda want one, but they cost as much as a magazine.
I do wish three things:
1. That I had the longslide version. The regular just looks dopey with a weapon-mounted light on it. I'd also like the longer sight radius. Plus, my Safariland ALS holster is made for the longslide, but it still does work with the standard.
2. I actually want a manual safety, and I've been debating about trying to install one. I'd only lock it on safe when I'm in the act of holstering, then click it back off in the holster, similar to how some folks use the M&P Shield safety.
3. I want a threaded barrel. But I don't want to spend a lot. That's more of a bitch than a wish.