I think I'd buy it. I just bought my first 10mm about 8 months ago, it's a DW Silverback and it's one sweet pistol. I'm a bit if a DW fanboy though. I've owned 3, 2 currently and have had excellent experience with them all. Maybe I got lucky but I don't think so I just think they're excellent guns. The big gripes I hear are falling metal and cycling malfunctions, not going into battery, failure to extract etc. I've said it here before but the only issue I had was some rounds not going fully into battery when my Valor was brand new but that was many boxes of ammo ago and no issues since.
I've read here by many that they dont see why a pistol should have to be shot-in and they should work right out of the box yadayadayada, like a Colt. Me, I know why that break in thing is a good thing, and why that tight slide to frame fit is a good thing, and why that barrel bushing being so tight that you are NEVER getting it off without that wrench, and that barrel hood showing absolutely no movement whatsoever no matter how hard I push down on it. All of that adds up to accuracy in what has proven to be a very reliable weapon. Believe me, that ultra tight fit isnt there to keep dust out of the gun.
DW produces guns with tight tolerances and that wear in takes it all to a higher degree of fit, micro-fitting those moving parts together even smoother. The galling I always read about is, I suspect, mostly user induced by several different reasons. Just follow DWs instructions for break-in and you should be fine.
I'd say buy it, and buy some of Underwoods 10mm ammo and you'll find out what kind of horsepower that 10mm round really has. It's a stout round and I've fallen in love with it. That poor little 45acp just can hold a candle to it.