Glock, if you can reach the trigger while keeping the barrel in line with the bones in your forearm. XD if you can't. Then take the rest of the $800.00 and buy a nice rig to carry it in. A nice rig,(holster,belt,mag pouches) will make practice much more enjoyable. The more enjoyable it is, the more you will do. Along those lines, the 40 is going to cost about twice as much to shoot (practice) with than a 9mm. I have an XD 45 as my primary carry piece. I love that pistol, but it is costly to plink with. As was my 40S&W. I am in the process of picking up an XD 9 Tac for the bulk of my IDPA and other combat practice. Lets face it, I don't need a 45 to defend my home. At in home distances of a few feet, 16 or 18 9mm at your disposal should be all you need. If that wasn't enough, then the 12ga behind the bedroom door should have been called up instead. I'm not putting down your choice of caliber, just making conversation. I think the 40S&W is a fine defense round. With the cost of getting to the range, combined with the rising cost of ammo, I need all the breaks I can get. By all means get what you really want, and go shooting. Handguns are a great pastime, enjoy.