Tamron SP AF17-50mm F/2.8 + Nikkor AF 70-300mm f/4.5-5.6G
reason: using 17-50 for both lanscape and Portrait, 70-300 for high zooming and "hard to reach"
Nikkor 18-135mm(d80 kit lens) + nikkor 50mm f/1.8
reason: 18-135mm for do it all(landscape and "hard to reach"), 50mm for Potrait.
BTW shooting lanscape most of time,
need not to consider budget for both combo above, as if my budget cannot reach for the item above. i might consider buying one at a time.
Reason for asking: Will buy a D80 in this month.