I have had the original N7 then updated to the current N7 2013 when it came out last summer. I can honestly say that compared to your other options and the possible future releases of a Nexus tablet......it wont be a 7 inch version. So with that in mind......getting the current version is still a great option for many reasons. PRICE PRICE PRICE.....when a new Nexus tablet drops, (supposed to be 8 to 8.9 inches) the price will come down again on current 7 inch one. Plus used/refurbished deals will be even better as well.
Secondly and most imports for the average user, the hardware and ability of this tablet is still some of the best. You are or will only be limited by apps. With a good GPS, data capable models if needed, a awesome screen, good sound, slimport/chrome cast capable, plenty of RAM (for now) and a S400 pro (de-tuned S600) snapdragon processor......this tablet will have a good lifespan compared to most all others for its stake in history.
So look for some good deals and try to get the 32g versions.
I was once ready to get a LG G pad....but the screen put me off. If that thing had the same display I would of got one.