Leisure battery what make and size ??

Hi all,

Looking for some advice please on which leisure battery to buy for our new caravan ? a fleetwood heritage 640 eb 2003.

We are new to carravanning and are quite lost on most of what we need lol.

we are currently looking at leisure battreies as we are planning on quite few occasions to possibly be using sites with no EHU so really need to make sure we get one that will more than adeqately meet our needs.

do any of you reccomend a certain make ?? ive been looking at Lion, Exide and Bosch which obv all vary a great deal in price but don't mind spending more if it really does make a difference. Also looked at different batteries running from 75ah up to 142ah and i have no idea which to get. Being a novice a presume the bigger AH you have the more items you can run off it ?? or is it case of just having far too much for what is needed. Any advice would be greatly appreciated.

Thanks