If you don't mind having to push a button, the manual Riva 510 Lite Bundle kit at liberty flights is likely the best price point. It's about $30 total after the october20 discount code is used. They are a solid vendor, an ECF Supplier (they have a forum area here). The base kit has two batteries, charger, two atomizers, some empty cartridges.
A typical cartomizer holds about 1 ml of eliquid, maybe 10 cigs worth. I prefer boge 2 ohm (low resistance, LR) cartomizers. They can also be bought at liberty flights, or NHaler, or litecigusa, or other places. Just look for boge 2 ohm LR 510 cartomizers (510 is the connector type).
There are other, larger, cartomizers available, and things called tanks. For simplicity and consistency I would still suggest the boge 2 ohm. There seems to be a fair amount of futzing around with many of the new "better" systems.
You will need eliquid to go with the above. Pick tobacco or menthol, whichever you use. Generally try 2 nicotine levels, say 24 mg/ml and 16 - 18 mg/ml if you smoked full flavored cigs, or 12 mg/ml and 16 - 18 mg/ml if you smoked lights. You'll need to find what strength works for you. You may choose one strength for more frequent use, with a higher strength reserved for craving points.
If you want to skip having to fill your own cartomizers, which isn't that hard, and is most economical, see this thread for suggestions on places that sell pre-filled 510 cartomizers:
http://www.e-cigarette-forum.com/forum/pay-forward-pif/202315-help-510-stuff-please.html
(The Riva kit will let you try atomizers, see if you like them, while having cartomizers, combined cartridge + atomizer, is what I use.)
If you are more concerned that the pv look like a cigarette, then perhaps try a KR808D-1 kit. I'd recommend a kit with two XL or mega batteries (they run longer between charges). I've used vapor4life (their vaporking kits are 808), nhaler, vaporsetc. They all have various coupon codes. An alternative to XL batteries is standard batteries + PCC (personal charging case -- a clamshell case with a battery to recharge them on the go). Some people will recommend things called the Volt or Bloog Max Fusion (BMF) -- those are new version KR808D-1 PVs; I haven't used them, so have no knowledge on how much better/different they actually are.
Picking up a third, spare, battery, then later on a spare charger, is also good, but don't sweat it right off.
Good luck!