I'm thinking of buying either 35 mm Af-s dx 1.8G or 70-300 AF-s lens.?

So after working for a while in DSLR , i'm thinking of buying either 35 mm Af-s dx 1.8G or 70-300mm f/4.5-5.6G IF-ED lens. So can u tell me which one I can get. Moreover 70- 300 is a FX one so if i put it on a APS-C (D3100) will it become 50-200?, if so do u think if i buy AF-S DX VR Zoom-NIKKOR 55-200mm f/4-5.6G IF-ED which is much cheaper will produce same IQ(Image quality). Moreover if u tell me niether of the two mentioned above is good then shall i go for AF-S DX Micro NIKKOR 85mm f/3.5G ED VR , i heard it's good for closeups and macros , so can u tell me how will it perform for distant objects.