I work as an ironworker and all our cutting torches have big handles, and either MAPP or Acetylene. I also work sometimes for a smaller company brazing copper assemblies, and for that work I get to hold a w-300 which apparently weighs in at a mighty 1.3 lbs.

I've brazed for long shifts and never really been bothered by the weight of the torch, nor do I have any issues with controlling the heat. If you're buying new it makes so much sense to get a smaller torch, esp. if you don't ever plan on cutting through thick steel plates or anything that I'd do for fun (ironworkers are a strange breed). I totally plan on brazing a bike with a torch like this or something similar that my uncle has left me.

If you're new to torches and propane/acetylene, I really second the advice to get new/re-furb'd gauges. Buy a lighter torch if you only plan on doing hobbyist work. The bigger torches will take more abuse, but really, be nice to your tools The person who mentioned stolen tanks was right on, they often go for walks on jobsites and shops so that could end up biting you in the bum.

Mind you, some folks here would laugh at my setup and how I braze: leather apron, full face shield, gloves all the time. Whatever torch setup you end up choosing, buy and correctly install flashback arrestors. At least one set on the torches. There's no reason to end up as a local news story.