Personally, i wouldn't buy a [phone] with a bigger screen than 5" with a small bezel (or possibly 5.2" with a tiny bezel), as anything larger cannot be used one handed.

Admitedly, I have pretty big hands, and capturing the 95th percentile of users for one-handed operation may point to a smaller 4.7" screen.

However, I do like very large phablets as they make excellent pocketable tablets, as a secondary device of course. A great example would be the Sony Xperia Z Ultra:
> Premium build quality with waterproof chassis
> 6.4" fullHD screen
> Snapdragon 800 SoC with 2GB of ram and 16GB or storage
> Will get Android 5.0
> 4G cellular connectivity
> Currently available for as little as £220!

Buy that, or get some plasticky, underpowered, feature-stripped bobbins from samsung for ~£170...?

If the existing Jolla chassis can accomodate a 4.7" screen, then by all means keep ToH as I would accept the compromise, but the screen is the priority here.