I am new too mountain biking and i am looking to buy a 2006 GT Aggressor, i am buying this bike because its a great price and i heard its a top ten bike. I dont have any bike dealers near me so i have to order the bike over the phone. What size should i get? I am 5'11" 190 lbs. Normal athletic build. Also my wife is going to get the female version of the same bike she is 5'2" 125 lbs what size should she get?