What's the actual difference between Sav's and the Rossi line? Does anyone have any direct experience? I know, it's not such a huge plunge financially speaking and the more pipes the better, but in the 60-70ish dollar range there's a lot of options. I am definitely going overboard as far as research but I'm riding the bench right now so I have too much time on my hands and not enough money. Also, I have been to a few different sites, does anyone know if Rossi is limited to 6mm filters? Thanks.