I like all the swim brands, I look for the cut rather than the material. Speedo were the best but not as great as they were. Personally I prefer Arena for swimming but for fun prefer a more skimpy speedo style.
I was into skimpy undies and bikini briefs and speedos but didnt know where to get the thongs at the time (1980's uk) then local department store had HOM thongs, Freddy I think I bought them and loved them from the start, although I still like all the styles.