14.2 second 1/3 mile? (oval)

ok, guys, tell me if this looks good. i want to make sure I'm not going to have any problems w/ batteries/ubec/balancer/li-saver/charger all working together.

1x - $280 - Quark Monster Pro 125b - http://www.rc-monster.com/proddetail...RK_125A&cat=21
1x - $90 - Feigao 540C-7XL - http://www.rc-monster.com/proddetail...540C_XL&cat=20
2x - $140 - MaxAmps Lipoly 4000mah 5S 18.5V Pack - http://maxamps.com/index.html?lmd=38931.363981
2x - $30 - 5s Smart Balancer & Guard 505 - http://home.comcast.net/~truerc/Charge/chargers.htm
1x - $25 - li-saver - http://www.atsrcplanes.com/lisaver1.htm
1x - $38 - UBEC - http://www.rc-monster.com/proddetail...=6vubec&cat=18

+ 2x astroflight 109 chargers.

is the li-saver nessecary with the 125b?