If you want a D3, you probably actually want a D3s, as it adds a few bits, and most usefully an anti-dust vibration system for the sensor - if you aren't planning on post processing, then dust in the sky can be very annoying.
You can also get cameras like the D700 and add a battery grip to them, which gives you the same resulting size camera, but with the benefit of being able to remove it if you want something lighter for travel.
I have the equivalent age canon cameras, the 1D Mark II and 1Ds Mark II, and these are great to use, but are bulky. I've a more recent 5D Mark II which gets more use.
I can see the appeal for some 'just view it on the TV' style photography, and avoiding computers as much as possible, but it might be sensible to plan to have some sort of workflow to upload the images to a web photo hosting service (still with no processing) since this gives you much more flexibility (viewing without the camera) and an effective backup mechanism too. Look at flickr or one of the equivalents, and see how easy it is to get images from camera to service (might be as easy as one click in an application with the camera attached to the computer).