Upload & Sell: Off
I think each level in the quality lineups, whether it be Bogen/Manfrotto, or Avenger, etc. has it's own limitation. The 420 is too lightweight for a heavy modifier-strobe combo. However, it's rather nice for a speedlight. You can whip out the 420, that Softlighter and get going in 10 minutes essentially. Very portable and lightweight. The next step and a half up, like an Avenger D600 "baby" boom, is substantially more rugged, but it is BIG and HEAVY. If the Vikings ever attack, I'm grabbing that D600 to fight them off. That bigger boom requires a heavy duty stand as well.
The 420 with the weight bag (optional) is nice, as the weight bag clips on to the end of the boom conveniently. I fill them with my old jars of pennies (sans jar of course). The other nice weights are those orange Manfrotto clamp on weights, as you can slide them along the length or clamp them onto the bottom of the light pole in order to lower the center of gravity and keep it from tipping. I've bought those second hand, as they can be expensive relative to bags filled with whatever.
The other nice thing to get are coasters because a weighted down stand can be clumsy to move (though skip this if on a thicker rug or outside obviously).