I'm not you,
I don't know you
what works for me, well, may or may not work for you
best bet is to take the money and try them out to see what works for you
I would stick to a caliber you already have, unless you are dead set on a new ammo type to stock or have a mancrush on a specific caliber.
Think of this as an opportunity to research and go fondle the goods,
to paraphrase someones sig line, you won't remember spending a bit more, but you will remember the POS you bought to save money for the rest of your life.
That said, there are many nice used guns out there, and I like the CZ 82, it is an amamzing pistol for just a bit more than a Hi-Point, and the 83 (civilian version) goes for around 400.