Just on the Deans connectors..
It is interesting to note that AFAIK the Deans connectors are only rated for 50A continuous, yet they're being put on packs capable of delivering twice that. There's gotta be some loss there surely?
When you're talking Corally tubes, figures I have seen are 200A continuous, which exceeds the majority of lipos out there.
My vote definately goes to packs like the Orion, Intellect, LRP, TrakPower packs with the Corally tubes built into the packs. I also dont like the look of the leads hanging off the packs either
There's an advantage to the Deans connectors on the packs... some chassis the tubes would be under the top deck and hence you'd be unable to plug in the leads to the ESC. You'd have a definate need for a lipo tray IMHO in that situation. With the leads, you could avoid using the tray and save some dollars at the expense of having to add more weight on the battery side than you would with a lipo tray).