Nikon's recent high quality 55-300mm VR DX lens.
Plugs the gap between the excellent but heavy FF 70-300mm and the cheaply made 55-200mm.
This one has a metal mount and an excellent performance, typical review:http://www.slrgear.com/reviews/showproduct.php/product/1359/cat/13
Excellent vibration reduction version 2 system
Cheapest price from main retailer (fulfilled by Amazon - so Amazon dispatch and guarantees) I have found by around £40
Only on special for a few days