Thanks everyone for all your help. I'll go with the Riva with the LR cartomizers. When I first started with my Joye 510, I got a bunch of sample packs from stictlyejuice.com and ended up using grape as my favorite. People think it sounds weird, but when they try it they love it. I keep hearing about PG vs VG juice, so now I need to get some samples from another supplier to see what I'm missing. I like strictlyejuice because it's so cheap, but I really want to know what the "premium" juice tastes like. Maybe someone can give me a link to a premium sample pack I could try? Thanks again...