I have also been wrestling with the same decision. I have a great road bike and have debating the aero-bars vs. a tri bike. My road bike is fit perfectly right now for long road rides but I don't think I am optimized for speed.

I am currently doing sprints and have a Oly planned for Sept, but am thinking about a HIM next year.

I was also told - not sure if true or not but the aero-position of a tri bike allows for more stroke power which actually helps with saving more energy for the run?

I won't buy anything until next year - unless I see a really good deal

but interested in others opinions as well.

Sharon