I'm having trouble deciding which lens to purchase next. It will likely be purchased used. My passion is nature photography, but I also shoot quite a bit in low light and love my f2.8 lenses. I will probably be going to Costa Rica next spring and may be shooting in the rain forest, which would seem ideal for the 70-200/2.8 IS. So, which would you pick if you were me? [] Hopefully I'll have both the 100-400 and 70-200/2.8 in about two years, so I'm really just picking which one to buy first.


Also, if anyone would mind sharing some pictures taken with the 70-200/2.8 IS ver1 and the 2x extender, that would be appreciated, too.


Thankyou!