The best answer for gearing on the Torq is my favourite hub gear, the SRAM P5 like that I fitted on the Lafree Twist. It'd need a sprung idler for chain tension.
With it's 252% range it would give gears from roughly 44" to 110" (that latter is the equivalent of the present Torq's 7th gear.) so infinitely better than at present, with only 200% range. About £200 including wheel build, choice of trigger change or right hand twistgrip.
The biggest benefit apart from the gear range is doing away with all the unnecessary gears. On the Twist I only use the upper three for nearly all my riding, second just for very steep hills and first for steep hills with the
large trailer.