Soil....
There are lots of options.....all it takes is money...more money = more options.
I seem to have found what works for me. I scan with Luna Gen 1 binoculars and shoot with the Digisight N550. In my situation night hunting is usually a close range event (100 yds or less) so this seems to be a good combination so far. The Gen 1 binoculars seem a lot better than a Gen 1 scope I tried and I am told it is because a thicker lens is required for the scope. I would recommend NOT buying a Gen 1 scope.
With lower end night vision ir emitters are a must. Both units I use have built in emitters and I have add-on ir units to increase viewing distance and clarity. The ir emitters really help to light up eyes when scanning just like when using scan and kill lights.
The big plus factor for me using the Digisight scope is the day/night capability. It's nice to be able to use the scope late afternoon and into the night. The PVS-14 or the mx-160 would afford the same capability since they are just add-on devices for your day scope.
As I stated before it all boils down to how much you want to spend and what equipment fits your particular hunting environment. It's a fact that you get what you pay for dealing with night vision but you don't necessarily have to get the top of the line either.
I have about $2100 invested in the units I have. I could have reduced that by getting a monocular to scan with instead of the binoculars.
Here is the minimum I would go with:
Digisight N550 $1250
Luna 5x monocular $275
IR flashlight (for scope) $60
That puts you just under $1600 and you can add a long range emitter later if you see the need.
http://www.sportsmansguide.com/net/cb/pulsar-n550-digisight-night-vision-scope.aspx?a=762739
http://www.sportsmansguide.com/net/cb/luna-optics-5x-night-vision-monocular.aspx?a=481493
http://illuminationgear.com/14322/26971.html
If you decide to step into the $3000 plus range there are lots of posts and sponsors on the forum that can help you decide on a high end unit.
The next major investment for me will be a FLIR unit to scan with and the only way I can justify the cost is multi use capability. ( I boat at night frequently)