Prepping for second season - buying new bike - need advice about tri vs road bike.

Hello all you triathletes,

I recently got some money and have enough to buy a new road/tri bike. Starting into my second season of triathlon and I've got the bug for sure. Absolutely love the sport!!!

So here's my situation:
- I train by myself 2-3 out of 4 days per week.
- I live in a rather hilly area.
- Do group riding approx. once per week, but most of the people I ride with are triathlon focused.
- Do participate in about 2-3 road races per year
- Do about 4-5 triathlons per year doing the 1/2 Iron distance (my favorite!)
- The new bike will be my only bike because my wife is going to be taking over my old bike and adjusting all the settings to match her requirements.
- Do about 2 100 mile road races each year, but triathlon is my ultimate favorite.
- Don't think I'm shooting for any podium spots; at least not in the next 5 years. I would however like to get my average up to about 32-34 K/hr. My current average seems to hover between 28 and 29 on my entry level road bike.
- I have brand new C2 aero bars that I could put onto a road bike if I went that route.

I can't seem to figure out what to do. Based on my goals and the above details do any of you more experienced triathletes have any thoughts. By the way, I've read dozens of sites and forums and they just seem to confuse me more. I'm asking this here after having done a lot of homework and feel like I'm no further ahead.

Thanks for your time!

Cheers,

Jared