I'll weigh in first I guess. Here's my thoughts, and you can agree or disagree with them as you see fit.
You are very close to one of the premier dive equipment manufacturers, Dive Rite which makes all of their soft goods in the USA, and HQ is just north of you in Lake City. They may not be the cheapest, but they put out very high quality products and stand behind them. Spear fishing is a unique activity as far as dive equipment is concerned but doesn't necessarily mean you have to have unique equipment to do it.
They sell something called the Hunterpac designed for spearfishing and it is a very nice rig, though it comes in just under $400 which isn't bad.
Dive Rite Hunter Pac | Air Hogs SCUBA NJP Store, SCUBA Sales
This is a nice streamlined rig that will keep your chest and sides open which helps tremendously.
You could also look at something like this
DRIS Dive Gear 28lb BP/W System | Dive Right In Scuba - Plainfield, IL - Dive Right in Scuba
Would allow you to grow with whatever you decide to do in diving, but also take almost 10lbs off of your weight welt *9 and change technically*, and still gives you the super clean chest area so you have full mobility.
Both of the above rigs will get you a much higher end rig, more versatile, and will most importantly help you with spearfishing since they are more streamlined.
You will see a lot of options for regulator sets, but either Air Hogs or Dive Right in Scuba *who can also get the hunterpac for you* will be able to help you out over the phone get a setup that will work best for you. I would recommend you watch this video to look at some options for hose routing, both of which are much nicer for spearfishing since everything is right where you need it with less drag and less opportunity to get something hooked.
[video=youtube;2OrTXi-hjv4]https://www.youtube.com/watch?v=2OrTXi-hjv4[/video]
