The ranks for the time being, from weakest to strongest are as follows:
Genin-Can learn E-B rank jutsu and can do E-B rank missions(few B rank jutsus)
Chuunin (chuunin level ANBU)- Can do E-S rank missions and learn any rank jutsu (few S rank jutsu)
Jonin/Special Jonin (Jonin level ANBU)- Can do E-S rank missions and learn any rank jutsu
Kage- Can learn any rank jutsu and doesn't have to do missions

rank chart
chuunin are 2X more powerful than genin
jounin are 2x more powerful than chuunin
special jounin are 5x more powerful than jounin
jounin are 6x more powerful than genin
special jounin are 12x more powerful than genin
special jounin are 6 times more powerful than chuunin

( Chuunin (chuunin level ANBU)- Can do E-S rank missions and learn any rank jutsu (few S rank jutsu) )

By that, all I need is my Genin to chuunin... Then I don't have to level him anymore.. Because he can learn ANY rank jutsu... I mean dude's.. Atleast make it so people will atleast want to try to pass Chuunin rank... And if you do the power chart thing... Chuunin can beat a jounin IF they use the right combo's with their jutsu's... I know ya'll will probably hate this statement... But I'm just stating the possiblities ya'll left open.

And BTW... Jounin/Special Jounin by what ya'll give, are pretty much Kage's without the rank.

ok,cai,but first,to the chunin exam!please read the rules there