the best tip for longevity is to have a couple in rotation and only run a few ml in them before cleaning. that way they don't gunk as quick.
I havent tried any high end atomizers, but I love the dse901. my only beef with it is it isn't as easy to take apart as a 510 and you can't debridge it with a pair of needle nose pliers (busted one up trying). The joye 302 is pretty good too, with a few notes; they suck till theyre broken in, they come full of primer, they need to be debridged, and they need less wattage than a 510 cause they burn hot. I like my 901s on my roughstack, my 302s do much better on an ego with a 801 adapter.
either one offers better flavor than a 510 imo, with the 901 doing better with fruit flavors, and the 302 better with coffees, chocolates and spices. The 302 wins on vapor production quite easily, though the 901 has a better draw
