Bike recommendation please

I'm hoping some of the collective wisdom of the forum might be able to help with advice on a new bike quandry.

My wife is taking part in the Celtman Ironman this year and considering buying a new bike for it. Set in Torridon up in Scotland, the terrain is understandably quite windswept, hilly and with some fairly winding sections on the road. That said, it does also have some flatter sections on it as well as some long running descents. That means that neither a full on aero TT machine or a road bike set up solely for climbing fits the bill for the full course. Also, at 120 miles, comfort will be an issue.

Considering that, what sort of bike do you recommend. Feel free to talk, materials, geometry, handlebars or anything and your reasoning behind it. All good advice is gratefully received. Examples of OTP frames and set ups would be useful.

I'd go With an aero road bike With TT Extensions. If it is really windy. You'll gain more from being able to stay in the Extensions than you will from a bit more rim Depth.

Buying a bike for the conditions of one race is pretty extravagant, unless you have money to burn I'd look more widely at the sort of use your wife wants from it and maybe make a few tweaks for the particular event.

Something like a cervelo S5 can be set up as a flash weekend road bike, or an out'n'out TT machine. Simply by moving/swapping the saddle and swapping bars. If you ran a Electric groupset you could simply disconnect the cables at the Junction Box (I think). I'd love to do a similar thing With a BMC timemachine if I win the lotto.

How much climbing? I'd just get a TT bike and deal with it.

roadie + aero bars, unless she's qualifying for the olympics…

You could always setup the geo & cassette for the event and adjust it so when its all over.