I have started to collect a new army of ORKZ from scratch cuz of all the new stuff that got released for ORKZ.
I need help deciding something but first keep in mind that im more of a converter and painter rather than a player( i like my army not to be monotonous and each model to look very cool and different for the other one ) hence im going for boxes that give me loads of spare parts so i can even make my normal boyz look cool and different.
im planing on making the army to have diff units not big on zerg thats is 30 boyz

cuz soon people will know that with template weapon we die like anything + hate painiting so many models .....
I got the deff copter and the Wboss from the new starter box + got my self a battle force + nobz box and big mek
so here is my army that ive collected so far :
( every nob has power klaw tho i will model some with
DH weapon again cuz to make em look pleasing to the eye)
* 1
WB + 5 Nobz + mad Dok + trukk
* 15 ard boyz(including nob) + big mek
* 3 Nobz on bike (count as troops cuz of
WB)
* 3 deff kopters
* 11 shoota boyz (including nob)
i have not assembled these models cuz i wnat to get my last batch of stuff b4 i start assembling so i have a bigger range of parts wot im panning to get now is :
* Deff dread (ill convert this from scratch cuz the
GW model is very expensive and i dont relay like it

){will count as troop cuz of big mek}
*battle wagon (gotta get this the model ROCK

)
* either a box of 5storm boyz or box of 4Burna boyz + mek with burna (can only buy one box of any of them im running out of money

)

thank you for ur patience you have to understand all of the above was important to explain in order to present my question:
Q1: should i get storm boyz and use battle wagon and use Bwagon as stationary firing base with kanon and 4 Bshootaz or get burna boyz+ mek and load em inside the Bwagon
Q2 : which box gives me more bitz?
Q3 : is deff rolla a must on Battle wagon? + is the claw must on battle wagon ? cuz i want to use that as claw in making the deff dread
wot should i do?

or should i completely drop the last option and go for something else ?
i want my army to me fast and very hard hitting. i dont want to add more bikes or kotptas cuz i want a new type of unit on table once im done with all of this ill start making the current units fatter as ill grow the army. PLZ HELP ME PLZ.

thank you in advance and thank you for your patience (and sorry for my english it is not my language ) and please please dont flame

me this is my first post