I'd have no problem rocking a #7 Melo jersey, even after he changed it (if he does).
7 has always been my favorite #, but it's not the number that matters; it's the players name on the back of the jersey that's worth the money (that you spent on the jersey). Melo's last name won't be changing anytime soon.
Just got myself a custom made Jersey.
Got an Authentic Knicks jersey without the players name & # for $30 on Ebay. Took it to the mall & went to a store that does stitching (cost me 65) & now have a jersey that reads STAT n MELO Jersey # 17. 1 for Stat & 7 for Melo. Won't rock that jersey for the 1st time until our 1st playoff game!