I have a HS2000. I like the grip better than my Glock 19 but I'm still undecided on which trigger is better. They both feel good to me. I haven't had any problems with it but I just got it for Christmas so I haven't shot it that much. It's new, so not many parts and accessories are available yet. I know you can get night sights, lasers, flashlights, and holsters for them, but I'm not sure what else is available yet.
The downside is since it's a postban gun, you can't get hicaps for it. The good thing is you can modify S&W model 59 15rd mags to work, and the mags will still work in the gun they were designed for. I heard Beretta 92 mags will work too with a little drilling and filing. I haven't shot the XD-40, but I want one, so I guess that could be considered a recommendation.