I have a 318 and I really like it. Solid, performs well, the Maxle is the best thing to happen to 20mm thru axles, easily converts to 80mm travel. Never really hear anything bad about the Argyles except maybe the weight.
No experience with the DJ1 personally, but everyone seems to think that Marzocchi's quality is steadily decreasing...
marzocchi all the way. i had 2 sets of 318's and both broke. the compression catridge is not up to the job , atlast not on mine, and was leaking badly every time i rode them.