S G, My suggestion is to replace your broken frame and transfer all that you can to the new frame. Some things may come up during the transfer of parts that may require a replacement, best determined during the transfer. A pair of Syntace C2 clip ons can get you aquainted with using aerobars and working out proper fitment.
Since you've yet to compete in a tri, the bike you want is fine. Save the major cash outlay for when you've competed a couple of times and your talent and desire require higher level equipment. Good placement in a tri is rarely, if ever determined by a strong swimmer or cyclist, but in the run. Have fun.
Brad