Out of interest, where in the world are you? Are you able to get the tf700 tablet on its own where you are? I only ask given the time you post & that we can only get the dock & tablet combination together in the UK. As you are saying about the USB adapter, I am guessing you aren't getting the dock?
One final comment, the major reason to buy any transformer model is for the keyboard dock. After that, when you consider the tablet itself, Google's Nexus 10 (out now) & the Samsung Tab 3 10.1 which is strongly rumoured to be launched at MWC in less than a week have superior screens & specifications (granted the Nexus doesn't have a microSD slot) than the tf700.
The Nexus 10 has a better screen, double the RAM, will always get the fastest & "purest" android updates.
The Samsung will likely share the same specification as the Nexus 10 but with the added benefit of a microSD slot
Given that the Nexus 10 tablet is already cheaper than the tf700 & the Samsung will likely be cheaper or the same price, I am wondering why you would buy the tf700 if you aren't interested in the dock?