hey guys, once again i have some spare cash (and can buy a car soon )

I'm looking to add a new lens to my family currently consisting of canon 18-55, canon 50mm 1.8 and sigma 70-300m.

I already have a pretty big lens range, i would like faster versions of what i have already, however i dont have that much money

about £200 i would like to spend

Thanks
Nicholas-c

canon 50 1.4
tamron 17-50 2.8