Best battery... 2010 RRS TDV8

[AB]

I've never in my life come across a main dealer who would do an alternator change following failure and not change the battery at the same time. Until now. So I didn't bother checking the battery when I saw confirmation on the paperwork it'd been changed prior to my purchase.

Can has an intermittent starting fault so took the battery cover off and sure enough it's the original battery. Voltage tests confirm what looks like 'dead cells'.

Anyhow... what are the recommendations for the battery? I class it as a pretty important component considering everything it runs.

Bosch? Varta?