I agree with "gaint"
However it can get quite confusing when speaking on how frac ribs are controlled.
When compared to Masthead boats you have a proportionally larger main and yes your J measurement (foretriangle) is less. On both designs the headsail is important, it is just on the frac with your main being larger you have a wider wind
range in which you can operate with the given sail area because of the control you have with the main. Theoretically you would need less of a sail inventory on a race
boat because of this added flexibility. This would be true on a cruising boat too however when one adds roller furling
then not so much.
Also a frac boat usually sails
very well with just a main and this would be helpful in over powered conditions. Some masthead boats do not sail very well with just a main.
By adding backstay tension you are also twisting off your upper leech on your main which will give you a wider range in the higher winds.
As far as controlling your headsail goes it becomes more complex when you speak of headstay sag which can also sometimes be controlled by how tight your lowers are. And to make it even more complicated by adding runners you can specifically control headstay sag independently of the backstay. Most cruisers stay away from runners although there are a few out there.
Last but not least a Masthead boat usually can sail deeper downwind than a frac where your VMG is tied to sailing the right angles.
Well....hopefully this did not make you more unsure of what to buy.
I have owned both types of boats and love them both. I would definitely not avoid a frac boat for cruising providing all the other elements were there.
You should sail both and see for yourself.