Spend the Extra
I had 81K both ways LHR-SIN-LHR last month. Well worth the extra cash as I had far more legroom than my 6'1" frame could use. No foot storage during take off indeed, but the great big overhead bins weren't very full anyway. Also, after take off, I kept bits/bobs stored infront of my feet, incase I wanted them.
Note - from memory these are the only extra legroom seats which aren't near potentially screaming babies.