What Nikon macro lens?

[armatage]

I currently have a Nikon D3100 and will be replacing it next year with a D5100.

I'm going to be buying a macro lens for myself for Christmas and have decided to stick with Nikon and therefore have 4 choices but cannot decide: -

1 Nikon Micro-Nikkor Macro lens - 105 mm - F/2.8 - Nikon F (£600 ish)
2 Nikon Micro-Nikkor Macro lens - 60 mm - F/2.8 - Nikon F (£400 ish)
3 Nikon Micro-Nikkor Macro lens - 85 mm - F/3.5 - Nikon F (£350 ish)
4 Nikon 40mm f2.8 G AF-S DX Micro Lens (£250 ish)

I could squeeze to £600 if I had to and buy the 105mm
I'm currently thinking of the 60mm over the 85mm because of the larger maximum apature
I've ruled out the 40mm

Currenlty thinking of thr 60mm but what advantage would the 105mm have over the 60mm?

Any help welcome please.

 

[armatage]

Out of interest, why are you ditching the D3100 for the D5100?.

Mainly for for the auto bracketing function.

I think I'll pop for 105mm Nikon, I bought my 55-300mm lens because I thought that if I bought the 55-200mm I'd always be thinking "Wish I'd bought the 55-300"
If I buy the 60mm I may end up thinking "I should have bought the 105mm"

I will always have my tripod on me so being heavier won't be an issue.

Cheers for the info.