So did I. Only one in the list that I use are United Chemi-Con but not enough to consider this.
Panasonic is my current favorite but I'll use Nichicon and Rubycon as well (watch out for "Rulycon"!). Been trying to stock the long life EB series but they cost considerably more.
Quality from some of the old US brands such as Richey, Erie (gone) & Illinois Cap are OK. These guys have been around 50+ years but have been caught up in the 'outsource it and make it cheaper' mantra... too bad. Illinois Cap has been making lots of improvements last few years, been buying up some of the other big cap companies and are outsourcing a bit less. Hopefully they'll continue. Trying to work out a distribution deal with them but it's like banging your head on a wall talking to these guys.
Then there are the Chinese brands that are absolute crap such as GSC, CapXOn, Lelon, etc.