I agree with the comment about Orbea and Scott as triathlon bikes. I would suggest making sure you visit a couple local bike shops, including ones that don't cater primarily to triathletes. Try to ride ALL sorts of bikes. I agree completely with the comment about buying the frame and bike that you like, since you can upgrade the components. I personally advise friends against 105 components and many get the upgrade to ultegra right then and there when buying the bike. But, the first step is to find what YOU like. Then, make sure a knowledgeable person in the local bike shop (a fitter) looks at you on the bike on a trainer in the store and makes any adjustments in stem, etc. he needs to to make it most comfortable. We are all built differently and so different bikes fit us differently.