nice bike - many happy miles (kms) to you!
Black, Celeste, White all work. I'd go celeste to "balance" the overall theme, which is lighter. With black tape the bars/stem is the heaviest concentration of color and where the eye (mine) gets focused. A black saddle would help balance black tape. Black tape is easier to "keep clean". ( .... dirty tape and worn saddle means the bike gets used.)
Once you get on and start pedaling, you'll forget all about the tape color - whatever color you choose. Enjoy! /img/vbsmilies/smilies/smile.gif