should i go 4 big four's?

i've cleared P.E-2's first grp & appeared for second grp & will be pursuing my articleship in a month or so,pls tell me whether i shd go for big 4's if i do get admission there,the prob i'm thinkin abt is that i've heard that there working timings are very strict & they they give only three and a half months 4 prep's & i don't think its possible to take tuitons at that time bcoz it'll b the time 4 self studies & not 4 tiutons.pls advise me..