investing in new lenses

[thonik]

I have a canon 60d and 2 lenses a tokina 11-16 f2.8 and  ef-s 17-55 f2.8.I need to get some  fast primes as i do web commercials, music video clips and short movies.After research i found that nikkor old manual lenses produce great optical quality and come at a very affordable price.I tend to buy these 
Nikon Nikkor 35mm f/1.4 Ai S (approximately 340Euros)
Nikon Nikkor 50mm f/1.4 Ai S (approximately 150E)
Nikon Nikkor 85mm f/2  Ai-S  (approximately 250E)
Nikon Micro Nikkor 105mm f/2.8 Ai-S (for macro work) (appxroximately 260E)
and of course a fotodiox adapter
I like the fact that all these lenses are from the same manufacturer
I'm not sure about the macro lens and i need a second opinion if its going to be a serious investment in general. Whats your opinion?Feel free to propose other solutions