I've been following your posts, Nick, and I'm definitely having a bit of a disconnect given that, 1) you don't currently have a camera, 2) you seem to be in flux given where you'll be living and what specifically you'll be shooting, and 3) all I have to go on regarding how you'll be using your camera is the goal statement in your signature. From what I've been able to gather the idea is that you want to be able to create ultra-high resolution images suitable for very large printing with the greatest detail possible, and you do not necessarily need the most MP's per photo since you will be creating these images using panoramic techniques, but I get that MPs make for greater details. So you're somewhere between the D610 and the D800 and are stuck on 2 things, noise and AI filters.
I have to assume that these landscapes you plan on shooting will include night sky shots taken in extremely low light and high ISO's, otherwise you should have no reason to even be talking ISO noise since the performance of both the FX cameras is beyond impressive at anything considered a reasonable ISO. Given the panoramic landscapes you'll be shooting, you're bound to be using a tripod with a pano-head of sorts, so unless you're in very low light shooting in the "reasonable ISO" range shouldn't be a problem. And even when it's not, the differences between the two cameras should be of minimal impact given the technology available to reduce the already minimal noise levels you get is outstanding.
So what you need to decide is just how much AI filtration will mess with those miniscule details that will only be visible when enlarged. My contention is this: If you are willing to use panoramic techniques to create your landscapes then the AI filtration factor is likely more than negated by your ability shoot at greater focal length and get all the details you could want in individual shots before stitching, in which case I would opt for the larger pixel of the D610 to allow for better light sensitivity and more information per pixel.
Think of it this way. You're shooting a 120 degree field of view landscape. You lay out a grid pattern and decide just how many shots you want to stitch across that pattern. Say you shoot with a 70-200mm f/2.8 at 130mm and a D800e, and say that works out to 32 stitched frames in an 8x4 pattern. Why not shoot at 200mm with a D610, shooting 55 frames in a 11x5 pattern (the math is wildly estimated just to give you an idea)? You should theoretically be getting better detailed individual images with the longer reach, and with the D610 only having 2/3 the number of pixels the overall combined file size would not be that much greater than the 32 image composite from the D800.
What I'm getting at is that you may be drastically overthinking things. I have both cameras and love them both. I will tell you this, with great certainty - if you are looking to do large scale panos then you better invest heavily in computing power. I have a MacBook Pro with 16GB of RAM and am unable to stitch panos of more than 10 frames from the D800 without Photoshop blowing up on me. The 36MP files are tremendously large, and any and all workarounds to make it happen all come at a reduction in individual image size and resolution - something that seems to be at the top of your list of things not to lose. So strongly consider that as you do your deciding.
Honestly, you can't go wrong with either camera. But given that you have none now, and have given no real indication of what was the last camera you shot with and what you did with it, I just get the feeling that you're way over-thinking this whole thing, and letting the countless opinions of others sway you at every turn. My recommendation? Rent both of the bodies and a 70-200mm f2.8, get in the car and shoot, shoot, shoot. Take them home and process them. I suspect you'll have your answer in short order. Until then, it's just wheel spinning (which is the closest you'll ever get to me using an automobile analogy when talking cameras - lol).