Hi
Pirelli's Tyres are good, but I think no matter what brand you get, there all ways going to squirm out of replacing Tyre's for free, unless its a really obvious fault like cloth or wire hanging out of tyre thread
If your only using the car for general use all Tyre are much the same, even budget Tyre's are quite good these days
the only thing you have to watch is, if you like putting you foot down every now and then and your car is rear wheel drive, like the S-type then a softer type compound Tyre is better for grip, the S-type R will teach you this quite quick.
most Tyre are very good these days, I all ways say buy the best you can afford, never buy used or repaired Tyre's, definitely a no no,
I use the Continental sport contact 3, which came with the car from new, there ok, great once warmed up, but would also recommend, Goodyears eagles
There's usually some sort of compromise with Tyre's the harder they are, the longer they last, but the least they grip, The softer they are, The least they last, but the better they grip.
cheers
Joe