I'm giving serious thought to selling both my 4x5 and 645 kits and consolidating with a Mamiya 7 with 65mm lens. I know I'll miss the ability to employ front rise a huge amount, but at the moment I'm really not enjoying what shooting colour 4x5 is costing me, and I'm growing tired of the "should I or shouldn't I even bother stopping to see if this shot looks good through the camera" moments I'm having a heck of a lot lately.
I'm lusting after a DSLR with video capabilities...despite their shortcomings I'm genuinely interested in giving videography a try and it seems to be the best way there.
In reality though, I plan on holding on to my Mamiya 7 and Leica M7 for the rest of my life. They far exceed my capabilities right now but I'm okay with that as they are the proudest of my possessions. Any further money spent would likely do more harm than good for my psyche and work in general. I look forward to growing older with them at my side, as sappy as that sounds.
Nikon F/F2 because of how extremely highly regarded they are. Seriously...if you go to one of those "Whats your favorite 35mm SLR?" threads, 70% of the results are Nikon F/F2/F3. It was also the SLR to have for 2 decades or so. Nikon must've done something really right in 1959.
Anyway, I've never tried a Leica, but I guess there's something in them for so many people to call them the best rangefinders ever. I also want a Graflex Speed Graphic but developing sheet film would make me broke. I also need to get an Argus C3 sometime; they're cheap as hell and look great.