20k miles, you can look into using GM syncromesh.
good stuff.
I've heard a lot of positive feedback on the GM synchromesh, but in 2007 Honda updated their MTF with a new formula that performs as good if not better than the GM synchromesh. It's got a White cap.
The feedback from several master Acura techs with regards to the new Honda MTF is excellent and is widely recommended in the NSX community as well as other Honda communities. I'd stick with the updated Honda MTF. Just make sure the dealer is not trying to sell you cheap old stock.