re OP, wait for a low volume lull where the price has been stuck for a while, preferably where your big buy would trigger a trend line break that many were watching, like right this W/E for instance then what you don't need on Gox to do this with place long at your max leverage on Bitkoinica & then immediately pull the trigger, sell half the Bitkoinica gains send to Gox, buy more & try to cascade the price up maybe, drop me a PM first & I'll lend you a hand with it
add this; i would create an air gapped wallet for cold storage.
Personally what what I never liked about this option is that I might get to learn about some impending catastrophe and wish to sell immediately, not after 6 blocks. I want my Bitcoins liquid.
I trust Gox pretty much now, so I don’t mind using them as a "bank".
Can't you import private keys into MtGox? Doesn't that circumvent the confirmation wait time?