Provari w/ Kanger pro tank 2 should be pretty easy and very reliable to meet your needs.
^^This^^
Is what I use, Evod is pretty nice too but the Pro-tank 2 fits nicely and holds substantially more juice.
Beats the tar out of the I-clears and other top coils I've tried. Personally would suggest some sort of back up device. The Provari is solid but even it can break (mine did) the best thing about the Provari is even if you abuse it enough to cause failure (ak drop it just wrong) they'll fix it up. The problem being that it will take a few days to ship it too them get it repaired and for it to ship back.
That said I really missed my Provari while it was gone and was very happy to get it back.
Personally I've got the Provari V2.5 as my primary PV and a Intaste MPV that I'd picked up while my Provari was in the shop, but honestly my suggestion would be to get the Provari and some sort of Mechanical for a back up. Mechanicals have the wonderful virtue of being practically failure proof.
I definitely recommend going with one of the Kanger bottom feeds, The Evod about blew my mind when I tried it. It was so much better than carto's clean and easy draw with no waiting for the batting to get moist no burnt taste from using it with insufficient liquid saturation. No leakage like I've seen from the I-Clear much better draw than the Viva-Nova's.
I honestly don't know what AttyPops is talking about with this idea that dripping involves less knowledge/fiddle factor than a tank solution, Dripping means carrying a small plastic or glass bottle around with you then having to pay close and constant attention to how much liquid you're dripping in, too little and you get burnt taste and no vapor too much and you get a mouth full of juice.
Ideal setup IMO, Provari 2.5 with the extension cap ($159), 2 chargers one for home one for the office, assuming you work away from home ($40) 4 AW IMR 18650($40). Evod or Pro-tank 2 or both

($25-40) 5 pack or replacement coils ($15), some 18650 using mechanical as a backup (50), assorted juices to figure out your preferred flavor ($50).
Roughly $400, which is admittedly a rather daunting start-up cost, however I wish I had this knowledge when I started vaping, I spent over a grand on junk that fell apart before I finally sucked it up and bought a decent mod, If I knew then what I know now I'd have just picked up a screw driver right off the bat and used that until the Provari came out.
Actually scratch that just get
http://www.provape.com/ProductDetails.asp?ProductCode=PROVARISTARTER
Everything you need to get started, you can always get the extension cap and 18650s later if you want.