so my back tire is completely bald, I guess I need a new tire. Do I want Avon AV45/AV46 AZARO-ST 140/80($124.10) or Pirelli SPORT DEMON ($117.47) or the Metzeler ME880 ($140.58 )? the pirelli is the cheapest, but won't last as long, the Avon is a great looking tire, and the Metzeler cost more...