Opinions on lenses

[Major Nikon]

15. You'll have to copy and paste the links

DU evidently doesn't like the @ symbol

Assuming you want new, autofocus, and Nikon, the relatively new Nikkor AF-S 70-300mm f/4.5-5.6 G IF-ED VR is a good bet. It's a solid performer for a consumer grade lens and is within your budget. It will complement your 18-55 very well and although you'll loose everything inside of 55-70, I don't think you'll miss it. What's really nice about this lens is that it performs very well on a APS-C camera (like your D3200) even at the maximum aperture. Many consumer grade lenses really need to be stopped down for good to excellent sharpness, but this lens doesn't suffer much of a penalty at maximum aperture. That's a very good thing. Since it's relatively new, it's going to be harder to find on the used market. Here's a good review for it:
http://www.photozone.de/nikon--nikkor-aps-c-lens-tests/250-nikkor-af-s-70-300mm-f45-56-g-if-ed-vr-review--test-report

One thing you should know about consumer grade long telephoto lenses is they inevitably have a maximum aperture of f/5.6 on the long end and are limited by that aperture typically halfway or less of their extent. Where you will notice this most is with focusing in all but the best lighting conditions. Autofocus will tend to hunt more if it works at all and manual focusing won't be much better. This is the tradeoff for lenses that are lighter and cheaper. Professional grade long lenses tend to have maximum aperture in the f/2.8-4 range. Focusing performance is greatly improved in lower lighting conditions, but for this you pay a premium in price, weight, and size.