Rocky, I tend to buy own branded cream cheese (Philadelphia looky-likey) and buy the lighter version which sits between full fat and whipped whitewash.
Thanks Eccles, I usually buy the lower fat one but didn't want to play about with the recipe too much. I'll definitely use it next time as I think it'll be lighter.
I bought the Philli as it was on offer, so it worked out the same price as own brand ;)