The 1300 spinner is what my wife uses (pretty Pink!) and they aren't that huge

Besides 1300 lasts her like a day and a half without a recharge. The 650s are just too small unless you want to carry a couple of them.
I know a lot of other newbies will be reading this thread so I'll put this out there too...
That Vamo deal several pages back is a SWEET deal! So is the two spinner starter pack. Tough to beat those prices anywhere I've found (this side of a co-op anyway)... so good in fact that I'll be pointing some other more advanced beginners (the ones I've already answered a hundred questions for) in the direction of that Vamo deal and the Spinners for everyone else.
PRO: Variable wattage is all I use any more unless I have one of my wife's Spinners. The whole "automatically adjusting for resistance" is a very sweet deal and here is another reason why!
Resistance will not stay constant in an atomizer you are actually using. It changes with temperature and even with gunk build up on the coils. Some of my clearos started off around 2.6 ohms and slowly fell over a couple of weeks use down to 2.2-2.3, one all the way down to 2.0. A good vodka bath got them back up to snuff. So not only is VW on a mod like the VAMO the future (don't worry, I'm sure we'll be seeing VW eGos and Spinners one day soon too) but having a device that will tell you the resistance (like the VAMO does), so you can monitor changes over time, is a great way to roughly anticipate a needed cleaning or replacement... kind of like watching the mileage on a car to tell you when you are ready for an oil change.
On a tangent most manufacturers will list a variance in the resistance of their atomizers/carts. It might
say "2.4" on the outside or whatever but don't be surprised if you find a +/- .1 on many of them, even brand new.
CON: While I love my VAMO one thing I do not care for is the fact that the drip well is too narrow to fit most Kanger products without an adapter... I *think* this applies to the EVOD as well but can't say for sure. Second, you will read horror stories on the VAMO forum (yeah, it's THAT popular) about such adapters messing up the o-ring in the positive post of the mod itself, if they are tightened "too tight"! NOT GOOD! So I don't use Kangers and I don't use the adapters I see commonly sold, not on my VAMO at least... Third, the Stardust style clearos DO fit the the VAMO just fine BUT the knurled part at the bottom of the tank is out of reach once one of these is screwed on. This means you have to twist the top of the tank to remove it and yeah, even if you are careful sometimes they come apart instead of unscrewing, spilling any liquid you had left in the tank everywhere it's not supposed to be

SOOOO... Vivi novas are my top recommendation for the VAMO and as a bonus they work great. Any similarly shaped tank (for carts too) would be much easier to use on a VAMO without those sorts of headaches. On the other hand it may add extra encouragement to get into rebuildables (AGA-T2 and A7 in the mail!)