Electric meter key or normal meter?

i have a property with electric key meter and i find it bit of hassle gettin to shop's n get top up. I am looking to change into monthly bill system but before that i need some opinions on that. Is it good idea to get rid of key? Will it be expensive on monthly bill or is it same? i am with southern... show more i have a property with electric key meter and i find it bit of hassle gettin to shop's n get top up. I am looking to change into monthly bill system but before that i need some opinions on that. Is it good idea to get rid of key? Will it be expensive on monthly bill or is it same?

i am with southern electric. what is your recommendation for supplier as well.

Thanks
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