The Xcited is an interesting earphone... for a dynamic-driver it's quite lean-sounding, especially in the midrange. Do you like its sound? If so, the JVC FXD80 is the closest-sounding upgrade I can think of.
If you don't mind a little more bass and a fuller overall sound, the Philips Fidelio S1/S2 earphones could be a contender as well. The R-50 will be more balanced than the Xcited but you'll give up some of the bass punch, which you wouldn't be doing with an FXD80 or Fidelio S2.
interesting. i didnt liked the Xcited. how exactly is the fxd80 and upgrade?