Wash Mit and Wheel Mit are good choices
Shampoo is a good choice, some other idea's are the Meg's NXT, Dodo Juice Born to Be Mild or Sour Power.
Wax - I really like this wax, it is very easy to use. Your choice just depends on what you want to spend. Collinite is another wax to look at, 476 is great for durability throughout the winter. If you want to spend more than that, the Dodo Juice range at £29-£32 is a good range of waxes.
Paint Guard Plus - I would only really recommend this if you go with the Paint Prep Plus aswell. If you go this route, you don't need to buy a wax too. If you would prefer to go the wax route, get something like Dodo Juice Lime Prime to cleanse the paint first.
Applicators - these are better for applying wax:
http://www.waxamomo.co.uk/productcart/pc/viewPrd.asp?idproduct=100&idcategory=11The reason being is that they don't load of with much wax so there is less wax being wasted.
Microfibres - the ones you have chosen are good but not the best for buffing wax, although a bit more expensive, they are worth every extra penny, I would go for these:
http://www.waxamomo.co.uk/productcart/pc/viewPrd.asp?idproduct=132&idcategory=16or
http://www.waxamomo.co.uk/productcart/pc/viewPrd.asp?idproduct=126&idcategory=16Kdiz - Only the Wookies Fist from Dodo Juice is a £19.95 wash mitt, they also do a sheepskin one called the Tribble Mitt which is only £8.95.
Also, just to let you know, Dodo Juice Supernatural is a wax of it's own, it doesn't come in different colours, it is just the main range of Dodo waxes that come colour charged. Have a look here for the full range:
http://www.waxamomo.co.uk/productcart/pc/viewCategories.asp?idCategory=37Hope that helps a bit,
Chris