These: Welcome to the Blackcircles.com Help & Support Centre with the offer look good value. I've got the Goodyear Asymmetric 5s on the Z and they are much quieter than the Bridgestone Potenzas that came off it.
You only need to be concerned if the cracks are on the side wall, not the edge of the tread. Sidewall cracks suggest the carcass is damaged due to under-inflation or severe age. The cracking around the tread is probably just spirited driving.
My Z4 has just passed its MOT at a local indie tyre and service centre with similar looking tyres. "No issues" was the response from the MOT tester.
So I had a Golf R with the same wheel size...
My last tyre on it was a Goodyear Eagle F1 5 - They are £73.17 delivered. I liked them a lot.
Alternatively, the Bridgestone Turanza T005 is winning official tests all over the place. It is what I just had delivered for my Golf GTI (Mk2). In that size they are delivered £76.93 data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7
I see you're calling it "your Golf" already?Thought you bought it for your daughter? data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7
Or on that car, EVO has done a specific review. I've seen the Michelin Pilot Sport on Pneus-online for £87/corner delivered...
2017 EVO Summer Tyre Test - Tyre Reviews
Where did you see the Michelins at that price please?Black Circle have them at £101.
last time I saw a tyre like that,fews days and miles later the tyre started to delaminate..
Brake disc doesn't look to healthy..
Pneus-online. However you probably get a fitted price from black circles.
Try Asda tyres. They are suprisingly cheap as well.
You imagined it data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7
Should definitely be changed, and as Aerojon says get your brakes checked, that disc looks well worn.