well if you want big you are going to have to veg for a while
i guess that would depend what you call big and how much the op is aiming to yield per plant
some strains will get big* with little or no veg time and yield well
at the moment the largest strain i have growing is angel heart which is only 25% haze but still most of the pheno's have got to around 5ft tall and are still growing taller many branches as tall as the main cola they have all had to be tied over to reduce their height .. now starting week 3 of flower
these seedlings were around 1 to 1.5ft high when switched over to 12/12
i have had better luck with the 50/50 or sativa 60/40 dominated hybrids when it comes to finding a fast pheno that gets big and yields well with little veg time
if this is just commercial maybe look at power plant , also top dollar from secret valley seeds quite a few fast sativa dom strains out there