I just bought Mr. & Mrs. Smith and watched it the other night. The DTS soundtrack is really impressive. I haven't had a chance to audition War of the Worlds yet, so I have no reference for comparison.

Speaking of DTS, I'm constantly confused as to why certain studios do not adopt DTS. It seems to my ears that the audio on all DTS tracks is far superior than almost any Dolby Digital EX track - with a notable exception to the Episode I, II & III discs. Imagine the Matrix Trilogy in DTS... just my 2 cents.