Best Tyres for the Mercedes Benz C180 AMG Sport Estate

I bought my 2012 C180 CGI AMG about 6000 miles ago and it came with PS3s in the front. They were DOTxx15, so very high points on wear!
They had about 3 mm of thread when I bought the car and when changed them for the PS4s 10 days ago they still had 2 mm of thread! Main reason of changing before getting to the legal 1.6 mm is that I had a bolt stuck in one of the tire. (Yes, I drove the car for the last 2 months - about 1000 miles - knwoingly that I have an allen bolt stuck in one of the tires).
I was amazed how good they were even at the end of their life - 4 years old and only 2 mm of thread - going hard around roundabouts or cruising at high speeds on the motorway - no issues!

I've replaced the old Pilot Sport 3s in the front with the Pilot Sport 4 after doing a really lengthy research on what tires to choose. I wanted a good balance between road noise - fuel efficiency - handling. There are quieter tires or more fuel efficent, but PS4 seems the best compromise. I've installed them 10 days ago and I drove mostly in the city, but also on the motorway in the heavy rain. initialy conclusion: I'm impressed; going hard in roundabouts - no understeer AT ALL! On the motorway, full of water, driving at 70 mph, no issues, no loss of control - the old, worn PS3s were a bit scarry in the rain at high speeds.
Comfort wise... There is no comfort on low profile tires...

OEM fitment tyre on our 2012 Mercedes C class estate. Rear tyres lasted 18500 miles which is ok but not exceptional. Grip was good throughout the 3 years on the car and was still good when replaced at 2.3 mm. Fronts only half worn, still have 4.5 mm after 20000 miles so expect to see circa 30000 from them. Most use has been local driving or long distance motorway use but on the odd occasion I have driven them spiritedly on A roads they have gripped well in both wet and dry conditions and feedback has been good and predictable. My only observation is that they have suffered micro cracking on the shoulder which I would not have expected on a premium tyre that has been maintained at the correct pressure throughout it's life. No deterioration in performance but it looks a little unsightly. Overall a good tyre but now superseded by the Contisport 5.