We have been spoiled with great sound (source and speakers) on 2 more modern machines (from 2017 and 2018), so have been thinking about upgrading sound on our LOTR, which already has color DMD and shaker.
(BTW I strongly recommend upgrading to shaker, although that involves some extra work on LOTR.)
One route is better amplification and speakers, which seems to be the Pinwoofer way. The other route is better amplification, speakers, and source material, which seems to be the Pinsound way. Pinsound also offers 3 other community remixes for LOTR.
I can't say which is better, because it is up to the user. Some like the original sounds (an important point which I can understand), and just want better quality playback. Others may want better quality playback and to be able to incorporate better source material (ie, higher bit rate, better samples from the soundtrack).
PinWoofer is much more affordable.
I'm leaning to Pinsound someday, since I like the remixes. LOTR isn't leaving our house for a long time.