Fair few to choose from mate, more down to personal preference.

I have Megs Gold Class (had for ages and just using up) and Dodo Born to be Mild

Have a look here for some options.

http://www.cleanyourcar.co.uk/washin...os/cat_64.html

Or

http://www.polishedbliss.co.uk/acata...ucts-wash.html

If what you have already works for you then there is no need to change for the sake of it, finish what you have before spending money you don't need to.