By Yoko AS430 you mean the Avid H4s? They're High Performance all-seasons compared to the Avons, which are ULTRA high performance all-seasons. Yoko Avid H4s have a H-speed rating, while the Avons have a W speed rating which is higher. The Avon Techs are also better rated and cheaper.
I paid $25/tire for mount and balance. You don't need an alignment if you're just changing tires.
Do it at a tire place - they'll do it right and for cheaper.
My alliment is off by very very little, backed into a curb sratched the rim sorta thing..i'm not sure if there an avid A4 or not, the website shows nothing, they say call and find out.... I think there Avid Sd or something.. Maybe I just should get the Avon tires... Dealer wants $115 to mount and balance the tires. As far as tire shops, they all suck around here, Town Fair tire can never get any balances right... Where did you get your Avon's from, Discount Tire?