I have used both Camskill and TyreShopper and both are very goodIMO. Camskill just deliver and are subsequently cheaper but through Tyre Shopper you organise to have them fitted at a location of your choice, price wise they are the same in the end once you add in the fitting cost.
Many, many threads on tyres and which is best, cheapest etc on the forum, just use the "Search". Conti Sport, Goodyear Eagle F1 2's, Dunlop Sport Max, Pirelli's and Michelin's are all very good.