Yohan,
spend your beans $$$$$
The Mathews stand has a very large foot print and the shaft is quite rigid for a small stand. My take is you buy your beefier stands for larger strobes/large modifiers and have super stable strobist type stands.
I agree--stronger stands for large strobes and modifiers, smaller one for strobist. Already set for the former so I'm looking for the latter. I almost forgot what I was looking for and got a bit too focused on absolute sturdiness when it's a balance between sturdiness, light weight, and compactness that I really need for speedlites.
I'm liking the look of your stand. The one mike_d suggested looks good too with the same weight rating and actually a little lighter, but the Matthews is appealing because it collapses.

