Boca Bearings
I ran Acer bearings for a long time until I changed over to Boca Bearings. I'll never buy from another company again. They carry all types of bearings and are very durable and long lasting. I run Orange Seal bearings in my Xray that are ABEC7 but also run yellow seals in my 415 that are ABEC1. Car was fast at the last TCS regionals...If you wanna go low budge, Boca also has it's 99cent bearings.
http://www.bocabearings.com/main1.aspx?p=searchWebstore&s=3&where=%20storeid%2 0=3&colnames=Categoryvalues$4%20as%20[ID%20(d)],Categoryvalues$5%20as%20[OD%20(D)],Categoryvalues$6%20as%20[Width%20(B1)]