K-DST > LRR > LSRR
With the huge majority of 70's rock bits on it, K-DST is the radio station that gives the feeling of "classic rock" the most. Sure, there are some songs that seem a little bit out-of-blue (like "Runnin' Down a Dream" by Tom Petty which was released in 1989. It's a little bit weird to include it in an early 90's classic rock radio but I like the song a bunch nevertheless) but in general, K-DST was gas.
Liberty Rock Radio has far better soundtrack in general, with kickass songs like "The Seeker" by The Who, "Heaven and Hell" by Black Sabbath, "I Wanna Be Your Dog" by The Stooges, "Jailbreak" by Thin Lizzy. However, some 90's rock bits by R.E.M, The Smashing Pumpkins which I always consider to be Alternative Rock and Grunge although they might be classified as "Classic Rock" with 2008's perspective. After TLAD came out, the station included songs like "Wanted Dead or Alive" by Bon Jovi, "Wild Side" by Mötley Crüe", Touch Too Much" by AC/DC, "Highway Star" by Deep Purple, "Lord of the Thighs" by Aerosmith all of which exactly define my taste of music. Yeah, and also we have Iggy Pop as the DJ, what else is needed to make it even cooler?
Even though there were some good songs in it, I honestly wasn't too keen on LSRR . So this makes it a head-to-head race between K-DST and LRR. In short, I'd say LRR has a much cooler soundtrack but K-DST was way better at drawing the picture of a classic rock station. So my vote goes to K-DST.