dont buy mongoose just cause you like the color or something like that. go fit or a 2-hip (no eastern tho) a fit or a 2-hip you probabbly wont have to upgrade parts if you want lighter stuff go to plastic pedals plastic seat or plastic bar ends or take off the pegs.
AHHHHHHHHHHHHHHHHHHH dont get eastern they make good small parts (chain tensioners) but not frames or bikes!!!!!!!!!!! get a united or something like that just not EASTERNNNNNNN (or get a black eye killardio complete with like a 20.5 or 21in TT) depending how big you want it but i would get 20.5