I'm planning on buying some bear grizzlys and I'm trying to decide which axle diameter is better to buy... 8mm or 10mm. Is the added strength of the 10mm axle really worth the significant decrease in quantity and/or of aftermarket or replacement parts such as speedwashers, spacers and bearings?

Also, If I got the 8mm trucks, I'm planning on some Bones Super Swiss 6's. Does anyone know which width of spacer these come with? Is it the 8 or 10mm spacer?