The Nano sacrifices some space (width) for the lightness of it - some folks might have difficulty doing that famous diagonal lay in it due to the narrower width.

I'd get a bigger tarp if you're looking at some time in the rain. Size will depend some on the hammock you have - some are longer than others - and also on whether you intend to make it home, sitting under it cooking or reading or whatever in bad weather, in which case a larger tarp will do better for you. Some folks like to take a large 10x12 all the time and simply tie back the extra sections in fair weather. I have a tarp this size with four tie outs on each side - the ends can be set in like doors on each end quite easily, making it an enclosure.

You might spend some time at hammockforums doing some research, there's a lot there about many brands and their ins and outs. There's been some talk about the Nano as well.
_________________________
"In the beginner's mind there are many possibilities. In the expert's mind there are few." Shunryu Suzuki

http://hikeandbackpack.com