Most SS's have the 2 person bench in the rear, and just toss the 2nd seat if you pull it. I hated balancing my GS, so center steer is definitely the way to go, just not as social. They're just different boats to drive, and weight distribution on boats so light is very important.
I sold my GS to some sucker on the board here, and if I had to do it over again, I would even consider an XB if I wanted a general lake boat. If you're not going to turn blazing speeds, the SS or GS are safe enough, but I do not feel as easy to drive as an XB, and nowhere near as easy to dock. The GS definitely fits a cooler better than an SS, and both have good space in the bow for a paddle, or children who want to sleep.
You won't hate any choice you make. They're all fun.