Welcome Ben.

Having barely cleared TIG n00b status myself, I would just stick with 2% Lanth like Mike said. I tried the others and it always lit up the best, especially at lower amperages, nice general purpose AC/DC electrode. You might also consider skipping straight to gas lenses when you order up your extra cups, collets, etc. Lower gas usage and increased stickout for not much more $.

Try shopping around a bit more for the tank, around here the LWSes are happy to sell you a size T (mine was about $300). Unless you need portability, the refills are much more economical for the bigger cylinders.