I don't know about what equipment you have to hand but do t forget you'll be paying more to get them fitted if you can't do it, it sometimes doesn't work out cheaper buying online then getting them fitted tbh, easy enough to shop around your local garages for prices too!
I was given a set of contimotions for free to do a video for them (continental) and got on with them well, but they only lasted 6000 miles, which in my experience was'nt that good, they're branded as sports touring but with that mileage? and the rear constantly stepped out on me but in a controlled manor tbh, so not so much sport either! For free I was happy with them but personally I wouldn't buy them!
Tyres are very personal, if you have the extra money pr3's are the best wearing, but as far as I'm aware the compound is supposed to be very very similar to the previous pr2's, the main difference being the extra water dispersing sipes on the 3's