There really aren't any other choices as far as quality weighted shift knobs go.
The unweighted acrylic aftermarket knob I have now managed to develop a crack so I need to replace it. I've been meaning to get a weighted one for a while now anyways.
So the plan is just to get a pearl white TWM in the same style.
In the S2000 I have this one (it looks bright orange because of the sun but it's really a medium-dark red) which is textured and weighted. It feels awesome. They also make it in the ball style like I have on the 5.0.
TWM is the ****, though. Just gets pricey when you option it out (pearl finish, engraved), and they rape you on shipping.