I don't think another Marantz player will solve your dilemma. I own a modified SA-11S1, and it's deep, relaxed, 3-D soundstage is one of the reasons I like it. It sounds like you want a cd player with a more forward presentation. I'd recommend you try one of the Esoteric models, though they are not as rich tonally as the Marantz, they are more immediate. One has to make tough choices.
Of course, you could just try using a Virtual Dynamics or DCCA power cord on your Marantz. That'll move you quite a bit forward too. The Virtual Dynamics will put you in the front row, some folks like that.
Cheers,
John