Pretty sure all chargers have storage mode for lipos... if not I would question why they are in the market.
Since you said the dynamite one is out of price range... the other best charger is the TP820CD that puts out 20Amps per port... I can charge a 6800 2s lipo in like 10 min at that amperage. http://thunderpowerrc.com/html/TP820CD.html
But prior to that charger, I had the DuraTrax Onyx 245... personally if you don't mind the rate/time it charges at, this is a good decent charger... But for me, I needed a charger to punch out batteries to keep me running for the day :P
I'm looking around on amain and the ProTek R/C "Prodigy 620 DUO punches out like the TP820CD for a little bit less.