My current tyres (on a ZR-7) are MEZ4s which went on about 7 months and 6k miles ago. I now have a front with about 3mm of tread and a square back with bald bits in the middle - I do loads of motorway riding. I had wanted 020s but couldn't get any quick enough for an MOT. So is this a no brainer, new MEZ4 on the back? Or just go for a totally different set - M&P are doing Contiforce pairs for £120? What I really need at the moment is economy.