Thanks @350Butcher this is the thing with tyres like with many other parts, everyone has a different view which is great but not so great at the same time. I spent around 2 hours today looking at reviews/videos online and had made my mind up on the Nankang AR-1
From what info I can gather they perform from the get go and can last a full day without any drop off in performance, people were talking about knocking 2 secs off their previous best on lap 1 or 2 on a 2 minute track then another second or so after 4/5 laps and the same times thereafter.
When I looked at Michellin Cup 2 and Pirelli Trofeo R, no doubt they are a faster tyre when upto temp but lots of reviews saying they take a few laps to do it and times come down like a second a lap for first 5 laps then consistant after, there was a great video on youtube with a guy comparing cup 2 to pilot 4s road tyres on a damp road and the cup 2's were spinning at every opportunity, he just couldn't get any temperature into them for them to hit their peak window and the trofeo R are advised to use caution in the wet, not saying the AR-1 will be great but they seem a softer compound which will work better from cold. The Trofeo R seems to get the best rating out of any road legal tyre in the dry but it needs a very specific pressure/temp to work otherwise the performance falls off a cliff, read that as unless you have a full pit crew with tyre blankets its nigh on impossible to get the perfect pressure.
Not really looked at the A052s apart from the Yoko site that markets them as a street sport tyre, that put me off a little as the AR-1 are marketed as a Trackday specific tyre that is road legal, if that makes sense.
I will try and make my mind up soon as I need to bite the bullet and get some sorted, also the AR-1 are £800 set in sizes I need (demontweeks), 265/35/18 and 235/40/18 which seems great value compared to the others which are £1000 + although the price is not a factor in my decision, its always good to save money.