Ok, so I'm getting a Glock after next paycheck. After that I want to build a tactical shotgun. Should I go with a cheap Remington 870 Express (290.00) and go form there. or, should I buy one of remington's Police shotguns, OR, lol, should I get a Wilson Combat shotgun? I know I want a sidesaddle holder, surefire light, and XS sights on the shotgun, I just don't know which one I want.