After watching a video on the powermatic it seems to have some great features
https://www.youtube.com/watch?v=AM0htu5ZemU
If you really want to pump up your budget and get a bigger discount :)
This is the style I have and the easily moveable x,y,movement vice that moves with a turn of a wheel makes it very easy to move along a piece as you mortise it.
http://www.grizzly.com/products/Heavy-Duty-Mortiser-With-Stand/G0448?utm_campaign=zPage
woodworking classes, custom furniture maker