Honestly its up to you. As long as you don't intend to take an ics over 400 fps, bringing up the need for a reinforced mechbox I'd personally go with ICS if you want something like the CXP concept or the SIR M variant which G&G is lacking right now. If you want a standard M you can swing either way.The pricing structure of both brands is so similiar to go from one to the other its like $20~30.
etd/Carmelo - Team North Bay
v3 Aeg specialist