Theres no question about it GonG is the only way to go. Ive hit both GonG and Grommet and the difference is night and day. You wouldn't think the difference would be so significant but it is. The first time i hit a GonG tube it rocked my world and i will never go back.

Also you can add a diffuser to GonG tube. And anyone who has hit a tube with a diffuser will tell you. They deliver some of the smoothest hits you will ever get.