bigger pots?

I was thinking about making some supersoil i was going to get the 10 gal roots bags will a 10 gallon make my plants bigger? i know about vegging and every thing im running a 1000 watt hps with a air cooled hood i have a dwc 6 plant tub but i want to try soil seeing is how i am always fighting root rot and gnats i know what to make ewt and everything i just want to try something new this will be my 4th grow.

I am using the 10gal fabric smart pots w/ handles.. they are working great & of course.. if you provide the veg time, it will make larger plants.

I also use supersoil.