Mark, I've used all versions of the KR that can be bought. lol My preference is for the regular sized auto's. I've tried shorties, and XL's. A couple of months ago I even caved in and bought some manuals, one regular, one XL. The XL crapped out on me real quick. I bought it from a vendor in China, so I'm not even going to bother returning it. The regular sized manual is holding steady, but then I don't really use it regularly. I mostly use it while I'm waiting for my auto's to finish charging.
Thankfully the vendors I use are great, and they replace the faulty batts, most of the time without even requesting I return the bad ones. I've just really grown tired of fighting with the batteries themselves.
I'm very grateful to each and every reply on this thread, so thanks to all who offered their advice and recommendations. As is true e-cig form it seems, I think my path will be to buy more than one of the suggestions here, and try them out. As soon as my bank account catches up to my train of thought that is.
(we all know how that is) I'll purchase the first this week. I think I'm going to start off with an eGo, and work my way up to the power-tool versions, like the BB or SB, etc. Been watching you-tube reviews on all of them, because of your recommendations. I'll write down the other models mentioned here and scope them out too. Again, thanks so much for the responses, and feel free to keep 'em coming!