For those interested in a price list, here are the lenses I'm watching out for, I used b&h prices as references. I made this list back when I looking into it in this thread (
https://www.pentaxforums.com/forums/non-pentax-cameras-canon-nikon-etc/176960...ml#post1847839) so prices might be outdated by now althought it wasn't that long ago. The nikon zooms are expensive, third party is definitely the way to go for zooms. But the primes cost about the same as an equivalent FA limited.
Zooms:
Tamron 28-75mm f/2.8 XR Di LD Aspherical (IF) Autofocus Lens for Nikon SLR
Tamron 28-75mm f/2.8 XR Di LD Aspherical (IF) AF09NII-700 B&H
$499.00
Sigma 24-70mm f/2.8 IF EX DG HSM Autofocus Lens for Nikon AF
Sigma 24-70mm f/2.8 IF EX DG HSM Autofocus Lens 571306 B&H Photo
$899.00
Tamron SP 70-300mm f/4-5.6 Di VC USD Telephoto Zoom Lens for Nikon
Tamron SP 70-300mm f/4-5.6 Di VC USD Telephoto AFA005NII700 B&H
$449.00
Primes:
Nikon Super Wide Angle AF Nikkor 20mm f/2.8D Autofocus Lens
Nikon Super Wide Angle AF Nikkor 20mm f/2.8D Autofocus 1913 B&H
$499
Nikon AF NIKKOR 28mm f/2.8D Autofocus Lens
Nikon AF NIKKOR 28mm f/2.8D Autofocus Lens 1922 B&H Photo Video
$259.95
Wide Angle AF Nikkor 35mm f/2.0D Autofocus Lens
Nikon Wide Angle AF Nikkor 35mm f/2.0D Autofocus Lens 1923 B&H
$349.95
Nikon Normal AF Nikkor 50mm f/1.8D Autofocus Lens
Nikon Normal AF Nikkor 50mm f/1.8D Autofocus Lens 2137 B&H Photo
$129.95
Nikon AF-S Nikkor 50mm f/1.4G Autofocus Lens
Nikon AF-S Nikkor 50mm f/1.4G Autofocus Lens 2180 B&H Photo
$449.00
Nikon AF Nikkor 85mm f/1.8D Lens
Nikon AF Nikkor 85mm f/1.8D Lens 1931 B&H Photo Video
$424.95