A friend of mine is looking for one main stay-on-most-of-the-time lens for his 60d. ; Wants to keep it to around $500. Here are my suggestions: Canon EF-S 18-200 (new $569, used from $390) ... ; LINK (new) LINK (used) Canon EF 28-135 ($412 new, used from $250)... LINK (new) LINK (used)