Titanium Push

I've decided to push forward with offering titanium bikes. This is quite a large undertaking as the costs are much greater than building steel bikes. I only need to do a few things to the shop to get it dialed in for building bikes out of Ti. I'll need to do a proof bike too. I wonder what kind of bike I should build? I already have 4 road bikes, 2 mountian bikes, a TT bike, track bike and cross bike. It'll probably be another road bike, they get used the most.