The Sigma's really aren't all that great. I'd probably buy a Hi-Pernt before the Sigma and they are about the cheapest (and ugliest) thing you'll find but some people speak well of them.
:HJ: Hi-jacking in Progress :HJ:
Since this appears to be your first gun, the main thing you have to do is find a gun that feels good in your hand and then has the highest quality that fits your budget. If it doesn't feel good then it's not going to be fun to shoot. If you're looking for the cheapest thing that might have decent quality (in a "name brand") then you're most likely going to be looking at a Ruger or Taurus of some sort. Just my :2c: here. Those two brands will most likely have the most variety to choose from and could have decent quality for the price point (especially used). The new SR9 is not a bad gun for plastic and if you want metal then you could probably find a P90 (or similar depending on what caliber you want). Taurus has a few offerings that aren't all that bad either. But you might want to save a little longer and get a nice Sig, higher end Smith, Glock, etc. A couple of hundred goes a long way on a gun purchase and it really depends on what purpose this gun needs to fulfil.