TS, yeah I think you should just take the plunge and cross over to the dark side... This is the Nikon subforum after all.... come come... we take good care of you
After having used a Nikon DSLR for over 2 years already, I seriously doubt I could be persuaded to switch camps.... there's something oh-so-wonderful about Nikon cameras!
Sell your 500d and 18-135. I doubt you need the range anyway, hor?
Get D90 + Nikkor 10-24 + 17-55/2.8 (if you feel rich) or Tamron 17-50/2.8 (not so rich). Need more reach? Get 70-300VR or 70-200/2.8 VRII....
Swee liao!
BBB
oh don't forget good tripod and ballhead...
let's do the Markins dance!