I will point you to this artical written by Thom Hogan.
I had spend approx $225-$250 on a nice (I thought) Manfrotto 3221 Tripod legs and Bogen Ballhead. It was a nice combo for short FL primes but the legs were heavy and remained home most of the times.
After getting the D800, started flirting again with a Benro/Sirui Tripod and Ballhead, but finally found a good deal on Series 2 Gitzo CF and Arca Swiss Z1. It was a little over my budget, but I think I will save over the long haul.
I do not know anything about Slik or Oben models you have mentioned but you will need a really stable support for your 200 Micro and 80-400 VR (especially at the long end).
See the various photo forums (including Nikonians) for people selling their used gear. Also eBay and Craiglist and I am sure you will find a nice set of camera support system and closer to your budget.