on the other end of the spectrum, lol - wismec rx200 with some lg hg2 batteries (mod and 6 batteries (2 sets of 3) - and make sure you have a 4 bay charger) and a twisted messes rda (v1 or v2 - both are excellent and pretty easy to build on) (to echo Thejkaz's first post)
the rx200 is overall a good mod (some reported issues with the 510, but i have a pair of them and no issues thus far) and with 3 18650 batteries in it, lots of run time... twisted messes rda offers lots of possibilities for building and fine tuning your vape - from simple coils to redonkulous