If you are going to invest in a camera as good as the D7000 seems, I would go for the housing that will be most flexible in use, then gradually build up lenses , ports and accessories. The ergonomics and build quality, the robust construction, suggest that an Ikelite will eventually be second-best, at best.
Tim

I will respectfully disagree with your statement for one essential reason. Building your system around a camera body/housing is always a poor investment.
Bodies change every single year and get massively better. And a new housing will be required every single time. Lenses are MUCH more important than the housing. My 60mm Nikon is over 10 years old and it's still a fantastic lens. I'm on my 4th body in the past 6 years. Strobes will also last much longer (in terms of obsoleteness) than housings. I know people that are still getting excellent photos using Nikonos SB105's that are like 20 years old, but they have a modern camera and housing. Ike DS-125/DS-160's, S&S 120/200's, Inon Z220/240s'. All of those strobes have been around for quite awhile and even the older ones are quite usable.
The original poster already said he won't have money to buy all the lenses and two strobes if he gets the Nauticam. So that means two years from now when his D7000 is at the end of it's release cycle, he'll finally be able to afford the strobe and lenses to get decent photos, but oops! then his D7000 body is essentially obsolete. I also personally wonder if it's worthwhile to spend $1200 on a camera body and $3100 on a housing most people will only use a few times per year. The OP didn't say, but if he isn't a diving professional or local, that's a huge chunk of money for a small amount of use.
To buy a more expensive housing and have to live with one strobe and the kit lens means limited, mediocre photos for the next 1-2 years merely to own the current state-of-the-art housing which by the way, will also be on the way to being obsolete in 2 years. If you stay with one housing brand, your investment in ports can be leveraged, but I've also found the ports tend to change and get better every couple of years too. There is just so much "churn" with bodies and housings I would never consider either an investment in my photography future.
If a person is willing to go to all the trouble of housing their $1000+ SLR, it doesn't make sense to cripple your output by limiting your underwater options. To me, this means at least one good macro lens and one good W/A or FE lens and two strobes. Having a Subal or a Nauticam or Aquatica would be awesome because they are great housings, but will they make your photos better if you only have one strobe and the kit lens? No. When I first housed a DSLR I tried to live with one strobe and the 18-70mm Nikon lens. It'll work and you can get "some" nice photos. You can do fish and people portraits but very little else. In general, most of my photos were fairly unmemorable from that period.
Make a smart decision on strobes and lenses right now and a person can keep those for 4-5 years or more and then in 2 years, maybe think about upgrading to the D8000 and maybe a better housing.
Again, if you have the bucks, the more expensive housings do give some ergonomic advantages, but having the right strobes and lenses is much more important. I can tell you as a person who has taken photos right next to a guy with an Aquatica and a D300 just like I have, the only thing that will determine the best photo is the guy clicking the shutter, not the housing. And mine were better heheh!
John