Well, I watched some scenes from JP DTS just now. You're absolutely right, the bass is very poor. I played with the lowpass on my sub, and very little content below 50Hz.
Just to be sure, I watched some scenes from Saving Private Ryan DTS, such as the beach scene and the tanks at the end. What a difference! The bass is SO AWESOME on SPR. I almost went ahead and watched the whole movie! =)
On a side note, the new 2001
looks good according to amazon... mastered from original negative and tape. Amazon will sell for $45! Yikes.
Also looks like a New Stanley Kubrick Collection
will also come out June 12. I wonder if the 2001 in this set is the same as the special edition above??