well, im a big fan of a balamced listed - my term which ive banded around numerous times is my "lethality list", which is basically making every unit in your army lethal and a game changer.
doesnt matter what they kill, what they leave will then kill them.
but if you go that way the other chaps wont play you as they wont want any more drubbings
haha
to help you through example, ill unleash my secrets on the forum...my "core" list is as follows
HQBiker boss - power klaw, attack squig and cybork - 150
Big Mek - kustom forcefield - 85
Troops30 footslogger shoota boyz with nob, power klaw, bosspole and eavy armour - 225
20 battlewagon shoota boyz, with nob, power klaw, bosspole and eavy armour - 165
10 gretchin with runtherd - 40
Elite15 Lootas - 225
Fast AttackDakkajet with additional super shoota - 120
Heavy SupportBattlewagon with deffrolla, big shoota & red paint - 120 (has boyz in it)
Battlewagon with deffrolla, big shoota & red paint - 120 (KFF MEK + empty)
1250
ive half written a tactica which i will finish this week which will explain in depth why i use these units always.
I then fill the extra points with one of the following depending on my feelings on the day (i dont list tailor to almost any degree)
For the empty battlewagon:19 battlewagon shoota boyz, with nob, power klaw, bosspole and eavy armour - 159
8 burna boyz plus 2 meks - 150 (8 templates & 2 S8 AP2 KMBs. usually prompts me to give the accompanying KFF Mek a burna too)
For the rest of the list:A second Dakkajet - 120
3 Nob Bikers + painboy. Waaagh banner, bosspole, 2 PKs and 1 big choppa - 300 (?)
8 Biker boyz with nob, power klaw, bosspole and eavy armour - 240
3 Big Gunz - Kannons - 60
10 more gretchin - 40
that all i can think of atm.
so, basically i have a core list and then have a squad rotation system - but as you can see, there is nothing that isnt lethal in there. That core list ook me since i started 2 years ago to get to and perfect though - and it may not suit you.
Back to you!id recommend going with your gut... but for me...as youve started with the bikes, id carry on with them.
i think you should buy 2 battleforces. that will give you 40 boyz, 2 trukks and 6 more bikers. also convert one of the nobs using the loota sprue spares into a big mek, meaning your core list would be
Warboss, big mek (kustom forcefield) and Nob squad in battlewagon (btw this combo is f-ing lethal)
12 boyz in trukk
12 boyz in trukk
30 footslogging boyz
9 warbikers
Dakkajet
2 deffkoptas
(lootas go in the optional list in the long term)
you have the footsloggers to play the anchor midfield role home objectives), and a whole heap of fast shit to charge at the opponentt in turn 1 you basically elimate a shooty armies plans as they have just 1 turn to kill you all, before you jump out of your vehicle in turn 2 and slughter everything
Clearly this is shaping into a speed freaks style list, so my recommendation is to make a speed freaks list...IF that suits how you want to play!