"STADIUM TOUR 2002" has great vocals, not spectacular show though. Loved the medley but "Trauma" 2 times... Urgh.
"ARENA TOUR 2002" has great performances, great outfits, and lots of different remix! Plus, there are 3 really cute clips of Ayu backstage! But backstage clip between the show wasn't cool.
"ARENA TOUR 2003~2004" for her "Memorial address" performance!
"Concert Tour 2001 PART 1 & 2" are also good, entertaining but vocals are boff.
I'd say "DOME TOUR 2002" because of the amazing vocals, performances, amazing opening, great songs. "SURREAL" and "ASFXX" are especially PERFECT.
Don't buy COUNTDOWNS... they suck. LOL!