Don't know about the 370 brochures in the UK, but over here there are two tyre options listed, the Bridgestone Potenza, which personally on the 370 I find very noisy, and grip isn't enough same as when they put them on the 350's. Anyway, the other option they list is the Yokohama Advan Sport V103. The V103 also has a very rigid sidewall, similar to the Potenza. V103 tyre noise is very minimal in comparison and grip levels even in the wet are great. Really got to give the tyres a hard time to get the VDC to light up.
No idea what the pricing would be like over there, but here they're at the higher end of the market here, but it is the only thing connecting you to the road!