I've heard good things about GesWall,
I tried it once and it worked fine for me and seemed nice but I was too used to sandboxie which works differently so I didn't keep it.
But it is a nice program and does offer great protection, If your browser is contained with GesWall and you download an executable file then that file will also be restricted to what it can do in case you accidentally download something malicious.
Also I wouldn't say HIPS programs contain a lot of false positives, that's actually the way they're supposed to work, especially what's referred to as classical HIPS they alert you to many changes on the computer, if it's your first time using a classical HIPS then all the alerts you'll get might make you go a little crazy at first.