I assume this is for general DJ and PA use?
A Shure PG58 is a budget version of the SM58 at £50 on the button, good quality, good feedback performance, typical Shure vocal lift, or what about a Sennheiser Evolution E525S which is their 'equivalent' vocal mic with the same qualities at around the £48 mark.
Steer clear of the popular 'studio' brands like Audio Technica MB etc as they are a pain for feedback in live work.
sennheiserShure