That's a good site for mods.  I've used it often.  I have an Indulgence because I was wondering what all the fuss about 6v vaping was about.  
In the end, I use an eGo daily as my go-to PV.  The 1100mAH batteries last me a solid 10 hours between charges and I usually vape about 3ml a day.  Normally I use my eGo with 901 atomizers because I can't kill those things.  Lately though I am tired of constantly refilling the carts because they hold about 12 drops.  I just got some cartomizers so giving that a shot and so far I'm liking it...  The eGo-T atomizers are a great idea, but a bad design imo.  The eGo B-Type leaked a LOT.  
Too late for the short version, but what works best for me is the large eGo batteries with a regular 510 or 901 atomizer, or cartomizer.  Best bet is to shop around, try different things until you find something that works best for you.