Summit ESC/Motor/Batt Combo Help

hi all

got a Summit on the way that i'll be using as a sensor carrying/FPV platform. been doing a LOT of studying and am still somewhat confused as far as picking a batt/mtr/ESC combo. probably unlike most, i am not looking to increase performance or speed, but rather to increase run time. as such i am planning for a brushless setup. so here's my desired criteria...

* 1+ hour run time
* performance equal to or slightly less than stock
* good quality, efficient components
* ~12v power supply (11+ is fine)

this rig will not be super abused, so i'm wondering if LiPo is ok?

if so, i'm thinking 2 x 11.1 3S packs wired in parallel. does anyone have a particular preference in batteries? i've used quite allot of ThunderTiger and Kokam cells before and have had little problems (in heli's).

i have an idea of which motors are decent, but don't know which are really efficient. i also don't know what kv i need to match the stock Titan 775, but i'm thinking around 2000 since a little less power is ok?

i'd like the ESC to be waterproof, or at least able to be made waterproof. i don't really know which is are the most efficient ESC's. LRP, Tekin and Mamba appear to be good, but i don't know for sure. it seems that an ESC may be more efficient if it is built with a particular battery in mind, such as being optimized for 3S packs. is this so?

thanks!