Been diving for years and ready to try a BP/W setup. Dove with a DM recently on vacation and he loved his Halcyon. I am fully researching the line and having trouble deciding which way to go. 90% of my diving is now vacation tropical based with some local warm water dives per year. On vacation I use a 3mm wetsuit and the same or a 5mm locally. I know the traveler or pro version would more than handle all of that. Should I consider maybe going to an Eclipse or Infinity with an aluminum backplate (to keep travel weight down) for future upgradeability? I don't do any cold water diving now but don't want to rule it completely out either. Also from what I have read the difference between the traveler and pro is the wing on the pro is a bladder within the wing where the standard is one layer. Does that really add two pounds (5 vs. 7) or am I missing something else? Anyone that owns either series or both and travels would greatly appreciate some feedback.