In regards to the SK DC-9s, the 9-21 is the best (as you will be flying, lucky thing
Overpowered engines, large wing, small fuselage. Little wonder it's known as the "DC-9 Sport". But not the best economic wonder.
In regards to the best perceived takeoff performance, the A320 downunder has the best feel, atmosphere to it. Nose rises a bit, wonderful whoosh spool up and then the CFM56 buzz, the whole experience. Simply wonderful. The 737 2nd Gen in comparison is quite boring. With the Boeings, you don't quite get that feel, IMHO to takeoff (ok, I confess I haven't been on an A340...yet!)
Best takeoff performance, probably an AN763 doing a MEL-SYD run. Max derate is 60°C, but its still loaded with power. Never seen any plane at Melbourne Airport takeoff in such a short distance.