Tamron or Nikon Glass Help!

Hi!
In process of buying a D70 that comes with Tamron glass,

for $70 more i could swap out to nikon lenses. Both were 28-80 mm and 70-300 mm. Can't remember the aperture limits, but they are standard and identical between the two lens packages.

Can anyone offer any insight or experience ?

Thanks in advance for any input you may have,

Todd