Look for a discontinued Zeagle Wicked Lite, it's basically a travel version of the Ranger. Like this one - although they only have it in XS.
Zeagle Wicked Lite Ranger BCD discounts on sale Zeagle - $325 Not to be confused with the Wicked which is more than the Ranger.
It's a Ranger with a smaller wing (32lb.) and the rear trim pockets are optional (I think they're $42?) It also doesn't have the Ripcord and I don't believe you can add it. It also does not come with the Personal Fit system so you have to buy a standard size. In cold water diving with a lot of neoprene it may not have enough lift. If you dove a standard Ranger, it was a 44# wing. .
Another option is the Zeagle Stiletto, it's a slight compromise in that it won't take doubles but if you never plan to, the rest is functionally the same. Slightly less lift - 35# but it has the Ripcord and optional trim pockets. I know people who dive one in cold California water. It's also a bungied wing which I actually prefer.
Zeagle Stiletto BC discounts on sale Zeagle - $599 I had one for short a while, it was as good as my Ranger.
Scubatoys also sells the Brigade - their own hybrid. It's a Ranger harness with an Escape wing.
Zeagle Brigade BCD discounts on sale Zeagle - $469
My last suggestion would be a ScubaPro Knighthawk. I went to my dealer to buy one but came back with the Ranger instead. It just fit a little better but I'm pretty tall in the torso.
Scubapro Knighthawk BCD discounts on sale ScubaPro - $617
Been to Divers Direct? They've probably got a deal on something. I know in SoFl both brands are popular
The Atomic Z2 is going to breathe identically to the B2 - actually their whole line does. It's $409 new everywhere. $509 (Z2X) if you want the 2nd stage swivel. The price difference vs. the B2 is less Titanium.
You can price a HOG (Highly Optimized Gear) D3 or Edge Epic (their rec. side) for around $300 new. A lot of people here like them. They're a newer line so their dealer network is a little sparse although I'm sure there's more than one Florida. Check diverssupply.com or divegearexpress.com.
Right now there's some good deals on both Cressi and ScubaPro regulators. Both are brands that have been around since the 50's. leisurepro.com or scubatoys.com have them. Scubatoys will have a full mfr's warranty for everything they sell. I'm not sure if LeisurePro is a ScubaPro dealer, they are a Cressi Dealer though.
Whatever you get I suggest you get a balanced 1st stage. The Cressi AC2 and I believe the low end Scubapro are not.