Pannier or large saddle bag for commuting?
I'm currently commuting about 160 miles a week and using a rucksack to carry my lunch/clothes which is driving me insane. It not only makes my back really sweaty but its also a pain when i want to do longer rides on the way home as it means carrying it for longer distances. Its a good/expensive rucksack, however its time for a change.
With my new frame nearly built i'll have the facility for a rack/panniers. I've also been considering a large saddle bag or frame type bag (maybe something from here: https://www.alpkit.com/explore/luggage)
Do any of you use any of the above? if so which would you recommend?
As always thanks for your thoughts