I was in the same boat not that long ago. I didn't own a 9mm yet and knew it was cheapest, so I knew I wanted 9mm. I started looking around (my budget was more like $350). I went to some stores and gun shows to familiarize myself with all of the options. TONS of Ruger P95s (as well as 89s and some of the others that are basically identical to the P95) and Smith & Wesson Sigmas. I hated the Sigma's trigger and the size of the P95 (I have tiny hands despite being 6'1" 250).
So, I was specifically on the lookout for an Arcus 9mm (Hi-Power clone), a Sig 2022 (don't like the 250s), or anything else that caught my eye for under $350.
Well, one vendor had NIB Taurus 24/7 Pro pistols on sale for $319+Tax. The trigger is a little different, but scores better than the Sigma. Additionally, they had a 5" barrel model that was still scores at fitting my hand than the P95. I kept looking for a Sig 2022 (they fit me better than just about everything I've ever held) but didn't find one for less than $399, and couldn't talk anyone down. I also didn't find any Arcus Hi-Powers. So, I bought the 24/7 Pro DS LS. It has been a FANTASTIC range gun! I've gotten very used to the trigger and it's the easiest pistol to shoot accurately that I've ever used. In the first 100 rounds or so, I had perhaps 3-5 failures, but it's been flawless for many hundreds of rounds since then. It goes with me to the range every single time.
So, look into the Taurus 24/7 Pro!
With your budget $50 higher, you have a lot more options available to you, though.