I have two bikes currently, one is a second hand lemond buenos aires with ultegra 9-speed and the other is a speed concept. Most of my specific training for tri is on the tri bike which has a power meter. Lately however I've been doing more rides outside on the roadie and save my tri bike for trainer use or when I need to hit specific power zones.

This brings up my question, should I invest in a power meter for the roadie (probably a powertap hub) or upgrade the components to shimano 105 5800 as I have a spare set of 11 speend wheels on hand. I know the power meter would make better sense for training but the old components are showing wear, especially aesthetically, and I feel I would enjoy the ride more with better components.

I'd like to add that I've had just a tri bike for the last 4 years and just recently got a road bike for more usability.

Thoughts?