If you're going to do dakka you could buy 2 Command Squad boxes.
2
TH/
SS and 2
CML on the same models.
The rest you could build storm bolter power fist. That would run you $120 if you used MSRP.
However you could alternatively buy two of these:
http://www.thewarstore.com/product74896.html
DV Terminators x 5
that would run you $32
Buy two cyclones here:
http://www.thewarstore.com/product27050.html
that would run you $10
Then buy an assault terminators box from here:
http://www.amazon.com/Space-Marines-Terminator-Close-Combat/dp/B000CESDTO
for another $45
That would get you 5
TH/
SS models, 2 Cyclone missile launchers, 2 Assault cannon Terminators, 2 Chainfist Terminators, 2 Powersword+
SB Terminators, and 4
SB/
PF Terminators.
You could thereby build 2 squads, with 1
TH/
SS+Cyclone, 1 Chainfist+Storm Bolter, 1 Powersword+
SB, and 2
SB/
PF Terminators per squad.
That would leave you with 3 extra
TH/
SS models in case you wanted to build more squads, plus 2 extra Assault Cannon Terminators - or 5 extra Terminator models. You could build these extra assault terminators dual-
LC if you wanted.
That would run you $87 for 15 models, but you would be A) buying them from different sources, and B) you would be getting less bits (no
HF, Maces, Plasma Cannon, Banners, or Apothecary Terminator bits).