After reading everyone's replies multiple times and searching through other related threads, it seems the choice in deciding on the "Best Lens Combo for the D90" or any DSLR for that matter, varies according to one's budget, picture taking preferences/requirements and personal preferences in image quality vs convenience and flexibility. In other words, no shoe fits all.
In this thread and throughout the forums there has been what seems to me, the novice, a number of excellent lens combinations suggested for the D90.
The following Nikon "lens combinations" seem to be most suggested/recommended as a good base kit or all that you need, with possibly one or two other lenses to round out your kit such as the 11-16 and 50mm.
(1) 18-55 DX VR + 55-200 DX VR - very light, cheap, but surprisingly good optical quality
(2) 18-70 DX + 70-300 VR - one step up from the kit above, particularly in build quality
(3) 16-85 DX VR + 70-300 VR
(4) 12-24 + 18-200
(5) 18-200 DX VR - convenient, one-lens-fits-all solution, but the above combos are better optically.
Now putting aside the many individual lens comparisons such as the16-85 vs the 18-70, along with the many other non Nikon lens options, the five Nikon lens combinations listed above give any novice beginner, such as myself, plenty to mull over when deciding (1) what lens combo is right for me? and (2) what glass should be my first purchase? and I can then build from there.
I am leaning towards buying the 18-200 DX VR, as my starter lens since most seem to agree that it makes a great general purpose walk around lens and one which will serve my immediate requirements as a beginner. I used the Olympus E-10 for years (built-in single zoom 35-140mm zoom lens) and while it has some limitations, the camera is capable of producing some very nice photos and I trust with the 18-200 VR lens, the D90 will produce at least as good or better.
As I become more knowledgeable and experienced using the D90, I can then work on building a higher quality lens combination to better suite my photo shooting preferences. As with the Olympus, I plan to use the D90 to cover indoor/outdoor car and auto shows, auto racing, car and model shoots as well as the occasional wedding and other fun stuff. As for the best lens combo for my applications, I am considering the following lens but think I will need at least one more fast moving action such as auto racing:
Nikon 18-200 VR
Sigma 10-20mm
Nikon 16-85 DX VR (or possibly the Nikon 24-70VR if $$ permit)
Nikon 70-300 Nikon VR
Sigma 30mm F/1.4
Nikon 50mm
Thank you all for your support and appreciate any further advise you can offer.
Cheers,
Scott Halliday