Leisure batteries

I'm sure you've been through this until you're sick of it, but what is
the current consensus as regards the best/ most cost- effective type of
leisure battery? Are the carbon- fibre types worth the extra? Which type
best resists sulphating when someone leaves the fridge on for a week
while the boat is moored unattended?

JS

JSprocket has brought this to us :
>Which type best resists sulphating when someone leaves the fridge on for a
> week while the boat is moored unattended?
>
The cheapest because they will be Knackered anyway after that.
I bought mine from Shield at Bishops Stortford and so far (kiss of
death) I am very satisfied, but I do keep them well charged and always
charge them prior to leaving the boat.