i'm currently shooting a mathews q2 and 2413 arrows at 29" and wisker bisquit. i'm looking to upgrade to newer equipment. i was looking at the new swichback verses the lx only $10.00 differences between them. also carbon arrows, i'm a 30" draw right hand and shooting 70 lbs. how do i size the carbons? i was looking at epic's and goldtips what size would i be looking for?thanks for the help and recomendations.