I am from Central Florida, about 30 minutes from Zeagle's Zephyrhills home. . . . From what I have read, they seem to have a great warranty and support for their products, and I like to support a local businesses. . . . That said everyone talks about buying used gear the first time, Does Zeagle give the same support to a 2nd or 3rd Owner?
No. But, if you have an original sales receipt, Zeagle is VERY GOOD about repairs (I sent them a 10+ y.o. Ranger and they repaired a tear in the fabric, with my only cost being the shipping charge to get it to them.) If you are not the original owner, they are not in a position to honor the original warranty as far as I know (nor is any other manufacturer, for that matter). That doesn't mean they won't help you, only that you may have to pay for the help.
Or should I just buy new.
A tough question for someone OTHER THAN you, to answer FOR you. I have purchased a lot of used gear over the years, on eBay, through local sales, and through Craigslist. I have been pleased with the outcome in virtually every case, so I am an enthusiastic advocate of used equipment purchases. But, I can service my own gear, so I don't have the added expense of initial servicing of used equipment after a purchase. Nonetheless, if a) you do your homework beforehand, and b) are disciplined, and c) are patient, you can often find good used equipment at a reasonable price.
To date I have only used an Aqualung Pro LT (thought it was bulky) and Zeagle Ranger BC.
You are in the same position as many newer divers, looking for their first set of gear. They have limited exposure to various rigs, and have understandable difficulty making selections. Consequently, many posts on SB often recommend a period of equipment rental, to try different configurations, before taking the financial plunge of purchasing gear. There is a considerable body of information on SB on various BCDs, and the pros and cons of different styles (jacket vs back-inflate, 'soft' back-inflate vs 'hard' back-inflate - aka backplate) and you would be well served to take advantage of that wealth of information here on the board, perhaps prior to an investment.
Also, my instructor strongly encouraged getting your Dive Computer first. He gave a lot of logical reasons for it. I have not used many yet, most of my dives has been with a Suunto Zoop from the rental shop. Let me say, I hate it.... It seems very slow and clunky.
There are several schools of thought on what equipment to acquire first. An advantage of a dive computer (at least a wrist-mounted unit) is the portability - you can use it when diving locally as well as when traveling, you can use it with whatever equipment you have - personal or rental, etc. On the other hand, particularly as rental availability of computers has increased, there is also the school of thought that - beyond the basics of mask and fins, AND a good, well-fitting exposure suit - the purchase of a BCD and regulator is possibly more practical than a computer purchase (I can dive without a computer; it is harder to dive without a regulator and a BCD). I don't know that one view is more 'right' than the other. As for the particular computer, I don't know that I would consider the Zoop to be slower or 'clunkier' than other computers, and you may find that the stage of development of dive computers has not matched technology advancements in other areas with which you are familiar. The Zoop is a functional, fairly popular, somewhat conservative, entry level computer. But, as has already been mentioned, there are a variety of similar, entry-level units available. You may or may not find a substantial number of used units on the market, however. Dive computer technology is continually advancing, and by the time someone decides to sell their computer, so that a used unit becomes available, that unit may either be a bit outmoded, or no longer fully functional. As for wireless units, that technology is evolving in two primary directions - RF and ultrasonic transmission. It is probably a bit early to determine if ultrasonic technology will supplant the far more common RF technology. But, for a newer diver looking at an initial equipment investment, I personally am not sure that a focus on wireless capability as a 'must have' capability is optimal, anyway. A lot of good diving, and diving skill development, can be done with tables and a functional bottom timer.