What Nikon Camera is Similar?

I tried out the Canon EOS 5D Mark II and loved it. I use Nikon and have all nikon Equipment. What is the closest I can get to the Mark II camera in Nikon cameras available? I know there have been similar questions about this and I have seen the D7000, D3S and the D700 compared but none of them seem that similar.

Best thing is to go to a photography shop (Not on a satarday) when thay have time to get them out for you and have a play around and see what you like

The D700 is the closest since it's the cheapest full frame. It's due for replacement by the end of the month

If you love the Canon 5D then get it. Since you don't know much about Nikon spec, I assume you don't have many Nikon equipments so it is not too late to switch. Since you do not specify what you like about the Canon 5D 2, it hard to assist. Here are couple differences between them.

Ergonomic: Nikon cameras & Canon cameras handle very differently. If you like 5D2 in this area, get it!
Image Size: Canon 5D2 focuses on Megapixel (large print in good light) vs Nikon D700/3S/3 focus on ISO (good in low light & high frame rate 4 sport)

Nikon don't have anything that is like 5D2!