Glocks and Sigs are both good for their own reasons. Both are very accurate and are damn near 100% reliable. Sigs have a very nice balance and fit the hand quite nicely, they also recoil very smoothly. Sigs also have a very nice DA/SA trigger and have a very nice fit and finish. Glocks are lighter, have a lower bore, and have the same trigger pull every time, and you can take the entire gun apart with a single tool. Another big bonus of the Glock is that a good portion of it is plastic, plastic doesn't rust, and the finish on the slide is supposed to be pretty slick too. Exposed to the elements the Glock will definately outlast a Sig. Sig and Glock are definately a couple of the finest pistols in productions today. In the end, make an informed purchase based on what features are the most important to you.