Depends, is that the SR9 full-size? The Glock 26 is tiny by comparison. Are you looking for concealed carry?
For around $500 you can hit a pretty broad range. I like the Magnum Research Baby Eagle series myself and the CZ-75B they are based on are good guns as well. The Baby Eagle can be found in full-size, semi-compact, compact, steel frame, and polymer.
Glocks are pretty much the gold standard for mid-priced guns. SIGs and HKs are nice but a new one will run much higher than $500.
I can highly recommend the Ruger P-series. I've never fired the P95 but I had the predecessor P89 and it was a tank. I've seen nothing but praise for the P95's reliability.
If your local gun range does gun rentals I highly encourage you to check them out. It will be well worth the cost of a rental gun to end up with something you like.