I've decided it was either a chuck or xhale. Anyone recommend one over the other? Personally, I'm leaning more to the chuck. Also I need help in deciding what attachments and battery combo to go with. Whats the benefit of the 510 over say an 801 or 901? Same of course goes for the atomizer. Would everyone recommend either a refillable cartridge or replaceable? I just need to have recommendations. I will be making the purchase tomorrow so I would also like to have flavor recommendations and accessory recommendations. Also I need a really reliable, easy to use, easy to maintain, and easy to buy replacement cartridges for that particular vaporizer for my mother for christmas.