I have the spot-bilts and while they are good shoes, they aren't that great for fieldturf type stuff. Will they work? Yes. Will they be like ice skates? No. But I think the smaller Reebok style studs on their NFL Low Grass and whatever is replacing that this year are better for what you are looking for. I'll probably get one of the Reebok models soon and use the SB for my mud shoes.
Nike also has a new shoe out that I tried on yesterday and seems to be an answer to Reebok's Low Grass. They are called the astrograbber are are very lightweight. I tried them on yesterday and while I didn't care for the fit of the shoe (Nikes have always been a problem for me), it might work for you.
Purchase officials has them. Other suppliers should soon.