Need at least two tyres for my Forester 2.0 S Turbo. Fitment is 215/60 16 XL. First, is it really best to replace all four at the same time? Second, been recommended Maxxis AP2s, but they're stretching my budget – Blackcircles have a budget tyre that actually gets better ratings than the Maxxis: B, B, 71dB (and most other – even premium – tyres). Are they any good, or should I stear (no pun intended) well clear. And, finally, can anyone make my life easier by telling me they've got four really good part-worns for sale? Many thanks.