I love having a pistol caliber carbine and shoot it at steel matches throughout the summer. A club I shoot USPSA at is planning a pcc match in spring/summer.
I have a Hipoint, a Sub2k (Glock based) and a Lone Wolf ar lower. My take on each:
HP: dependable, accurate, fair (almost ok) trigger, comfortable to shoot, mag changes tough because thick grip, inexpensive to buy, limited mag capacity.
Sub2k: dependable (with Glock mags, not aftermarket), only fair accuracy, fair trigger, uncomfortable (for me) to shoot (terrible cheek slap), easy mag changes, fair price, preban full capacity mags available.
Lone Wolf lower (Glock based): just finished build, still working on dependability, prob going to have barrel ramped, accurate, ok (better than fair) trigger, comfortable to shoot, easy mag changes, got a great deal on used and unfired lower with 10.5" barrel (I had an unused upper), preban full capacity mags available.
I have shot a Beretta once and was not impressed given the price point.
If I was looking for my first with a $1000 budget, I would go with a dedicated lower and modified Uzi mags. If I get the bugs worked out of my Lone Wolf then my preference may change. I like the idea of matching carbine and sidearm mags.
With that said, I love shooting my Hipoint, other than the mag capacity and slow mag changes.