Is the 7 fps on the sony nex-3/5 a huge advantage?

Is the 7 fps on the sony nex-3/5 a huge advantage over the nikon d5000/ d3100? Or is the viewfinder on the nikon cameras a larger advantage? I'm trying to decide between the 3 models. Also, is the nex- 3/5 a real dslr?

The FPS is helpful if you want to keep the shutter release button pressed for action shots of sports or perhaps wildlife… For anything else, such as landscape or portraits, it is totally irrelevant. The viewfinder is much more important, IMHO.

No, they are not DSLRs. They can use different lenses though.

The Sony Nex 3/5 is NOT a DSLR camera, it is an EVIL camera with an electronic shutter that "supposedly" gets just as good pictures as a DSLR camera. I doubt this, however.

fps is really only important if you are one of those natgeo photographers that takes frame by frame pictures of snakes attacking prey, or sports.
EVIL cameras do not have a viewfinder, which in my opinion sucks. People say the viewfinder is out-dated, but I dare you to take a better picture without the viewfinder. Along with that, EVIL cameras also have very few lenses 2, 3 tops and they are extremely expensive.

I own a Sony Nex 5. Seven FPS is an advantage for capturing expressions that sometimes pass in just a fraction of a second. So far, I have not missed the viewfinder--even when I've been shooting in bright daylight. The Sony LCD is truly excellent. I think you'd have problems only with the sun directly behind you. As for image quality, with the Sony kit lens, even at high ISO (6400 and up, for example) results are comparable to the Canon T2i with its kit lens (see http://www.dpreview.com/.../slideshow for a review and sample images).In fact, it uses the same size sensor (APS-C) as the best mid-range DSLRs. And if you don't mind manual focus, there are a host of wonderful, high quality, relatively inexpensive older lenses by the likes of Canon and Nikon that will work on the Nex with just an inexpensive $25 to $50 adapter. The advantage of mid-range Nikons and Canons is that they auto focus about twice as fast (~0.2 vs ~0.4 seconds). However, they do not auto focus or meter in video mode! Also, if you have the cash, there currently are a much wider variety of high quality Canon and Nikon lenses that will auto focus quickly (but again, if you don't mind manual focus, there are way more great lenses for the Nex since, with a cheap adapter, you can use just about any lens ever made for any DLSR). Finally, there's the portability issues. In the end, the camera that will be best for capturing great images is the one that you will actually use. The Nex is eminently portable; regular DLSRs? Not so much.