For climbers, Summit Viper is the most comfortable I've tried. Lone Wolf hand climber was the lightest and packed the best. My favorite all around was a Lone Wolf Sit & Climb with a Hazmore seat in place of the factory seat. Best combination of packability and comfort, IMO. A climber is probably the lowest barrier to entry, they are easy if you have the right trees for it.
As others have said, a lightweight stand and sticks is the most versatile option. The guys at Lone Wolf have started a new company, Novix, with significantly lower prices than Lone Wolf. I'd check them out. Do some research on other companies like XOP and Lone Wolf Custom Gear...there are some horror stories out there, but some folks love them. You might keep an eye on Camofire for Hawk Helium sticks and Hawk or Muddy stands too as a lower cost option to get into this. But again, for what Novix stuff is priced at and what it is, I'd just start there.