I have a '97 SX700 and my original plastic skis are starting to crack and little pieces are breaking off here and there. I have the red Yamaha GYT 4.5" plastic skis. Since I can't get red skis from Yamaha anymore, what aftermarket skis are recommended that won't break the bank? Also, what is the thought on going to a 5.5" ski since I don't ride the trails as much as i used to?