With $2000 and given your existing speakers, I'd recommend a staged upgrade. There's no need for a clean sheet straight away. All this will do is force you to spread your budget across 5 or 7 speakers rather than a few. The front 3 are by far the most important, particularly when movies are your dominant use (subs notwithstanding).
A new front end consisting of 3 x Ascend Acoustics CMT-340 SE M/C
's plus a pair
of Rythmik Audio LV12R
subs will come to $1980
shipped (with discounts). The Outlaw LFM-1 Plus on special is tough to beat though. The three Ascends plus a pair of the Outlaws comes to $1940
shipped. You'd be very happy with either option. Six matching 6.5" woofers across the front will give you an excellent level of HT performance for around $900.
As far as surrounds go, you don't mention whether you're aiming for a 5.1 or 7.1 configuration. Ultimately, you'd head for a pair (or two) of Ascend's CBM-170 SE's and/or HTM-200 SE's depending on your application. The 200's are a compact, sealed speaker more suited to near, or on-wall applications. The 170's are a more capable speaker, but more suited when you have the available room.
For surrounds/rears in the interim, experimentation and listening is the key. There's not really a wrong answer. For a 5.1 configuration, try both the JBL's and the Energy C-100's as surrounds and see which you prefer. For a 7.1 configuration, try the C-100's and C-50's as surrounds and rears; using the C-50's at the closer listening distance. Another option might be to experiment with the Veritas centre as a single rear in a 6.1 configuration. Do a quick Audyssey run with each combination. While Audyssey can make all speakers sound exactly the same, it will do a reasonable job of creating EQ filters for all speakers to target a common in-room response. Any one of these options may work so well that you feel a surround/rear upgrade isn't ultimately necessary.
Welcome to AVS and good luck!