New Battery advice

I have diagnosed a bad cell in my battery, it bubbles like mad on cranking. So i need a super duper replacement.
P38 Diesel auto, with everything on it.
I have had a look on Car Batteries, Cheap Car Batteries, Replacement Car Batteries, Next Day Delivery from Perfomancebatteries.co.uk and have one listed which seems like a good spec 1000A CC 4yr warranty but never heard of the brand Alphaline. Anyone have any experience of this make? Where else can try ( not HalFrauds etc)? Not that easy to find a bosch one/ anyone know the part number?

thanks in advance

Here you can find out about Alphaline a subsiduary of Hankook tyres
HISTORY OF ALPHALINE BATTERY ...:::