Sub-compact, tight budget, big bore...sounds like a Kahr CW-40 or CW-45 to me. I've seen the CW-40 at gunshows for $369 (always less than $400), and it is as good or better than a Glock, once you have put a couple hundred rounds through it to loosen it up.
It is the same gun as the higher end P series Kahrs, except it has conventional rifling (as opposed to polygonal), a pinned front sight (making it harder to upgrade to night sights), and slightly sharper edges on the slide, due to less expensive machine work. And it only ships with one magazine. You can buy extras at Bud's for about $23, I think.