That's strange that the Tornado is 1000mah... wonder if it makes much of a difference???
I bought my first eGo about 6 months ago, if I remember correctly, and there's no sign of wear or the batteries giving up.
The eGo (etc.), especially the Mega has improved vaping for me dramatically! What a difference from when I first started vaping and the PV of choice by the masses was a 510! With an LR atty and a Delron mini drip tip it can't get much better IMO.
I also like the eGo atty and cart with the Mega when I don't want to worry about running out of battery or juice. It feels like a Mack truck - a real workhorse and it's the size of a cigar! It's nice to not have to fool around with my PV all the time.
In the 8 months I've been vaping there have been some great improvements in hardware and it's exciting to think where it will go from here!

The 510 was the easiest for new vapers but now it's hard to recommend it when the eGo (etc.) is so much better and not much more money.
I think I'll always love my 5v box mods the best when I'm at home, though.