GG rear sacs vs 750s

I'm lookin to upgrade the sacs in my 03 Supra launch to the GG sacs. Gosh they are expensive and it would be much cheaper at least for the rears to pick up some 750s. I've read threads that suggest both ways are fine. Someone said with the 750s, they get a lot of bulging and stress, others have said that they have had no problems with the 750s in those rear compartments. I'm trying to save a little money because all the things I want to do are beyond my upgrade budget, so saving a few hundo would allow for some other things I want to do. But I also don't want to buy too big of sacs and have problems. input?