I see a lot of stores have the Burris e1 on sale. I'm not sure if they are being discontinued or what. I was looking at getting a Nikon Prostaff P5 4-16x42 but see I can get a Burris 4.5-14x42 for a little cheaper. Are they a good scope? I know Burris has its fans. And how does it compare to the Nikon Prostaff P5? I have a Prostaff 5 3.5-14x40 that I like. Thanks for any input.