Hi recordalley - the
G15 is a great P&S camera, but since you're coming from Nikon, you may want the option of using your existing lenses with the new camera.
For $501.62 you can buy a
$292.67 Nikon 1 J2 camera with a 10-30mm lens and built-in flash plus a
$208.95 Nikon FT-1 adapter that will let you use your existing lenses on the
J2.
The
J2 body is
smaller and lighter than the
G15 and its time to first shot is faster. This camera has almost zero shutter lag (0.094 seconds, compared to 0.2 seconds for the
G15), it shoots stills at 60fps and its autofocus is blazingly fast.
Here are some examples of what this camera can do:
Flickr: The Nikon 1 J2 Pool
The downside is its 10.1MP of resolution.
If you don't need compatibility with your existing lenses right away, you may want to take a look at the
J2's replacement - the new
Nikon 1 J3 ($546.95 at Amazon). It has even less shutter lag, and with its 14.2MP of resolution and 1" sensor size (larger than the
G15's), its image quality may come close to your
D90's.
Here are some
J3 sample images:
Nikon 1 J3 sample images - a set on Flickr
Hope this is helpful!
Bill