My ideal warp (for now) would have been XI-style flash/stretchy ship plus the TNG-style white warp flash at the end.
In surround-sound, of course.
The final scene of Generations?
A hybrid. Imagine the JJPrise warping like we see it in the film already, just add the TNG style white flash when the ship disappears.
On another note, after watching the youtube warp video posted above, it seems TNG actually brought back the white warp flash from TMP. Even if the link was unintentional, I never noticed it in TMP before.