I've got some cash burning a hole in my pocket.
Anything 10mm would/will be fun.
Do you hunt with your firearms or do you use them mainly for target? This would be the first question I would ask in determining the priority of each firearm category. You can easily use process of elimination to find a good group of guns to look at.
I would buy a reloading setup if I had $600 and didn’t already have one…just some food for thought