I have a couple of the Vmod XLs and one of the Vmod 2 "minis". Love 'em all. The XLs are my main vape, but I love the little guy when I'm away from the house.
My favorite atomizer is the Vapage pro spec AMG hybrid slant
coils. You'll get one in 2ohm with your kit (regardless if it's the premium or the a la carte). I get them all the time, and once you get the hang of 'em...they are amazing. Best way to approach the Vmod is "don't over think, over tilt, and don't over squonk!". Vmod is so easy it can confuse some people (myself included). I would heartily recommend the Vapage AMG pro spec slant coils. The prices are competitive with any higher end atomizer. You CAN use a Joyetech 510 atty or other cheaper atmozers, but the quality of vape will not be quite as good. IMHO.
I'm going to try the Cisco Spec 2 ohm bridgeless atomizers...to see how I like them and if I want them for back up. It pays to have back ups, you know! They cost about the same as the Vapage atties.
The Silo cartomizers are really amazingly good for cartomizers...but yes, a little high priced. You can get along fine with a
smok brand super shorty cartomizer (in your chosen ohm) that are available at Madvapes and at Discount vapers.
You can always use Boge, Kanger or other regular cartomizer on the Vmod, too. I dont' like them as much as the Vapage Silos or the Super Shorties...but that's me. Many people swear by the Boge or the Kanger (in particular).