I also forgot to mention:
When considering PJ's, always keep in mind that you dont only spend for the PJ and screen. A very important conisderation is lighting & cable management.
PJs need a darker room to operate best, and if your place is has lots of uncontrolled ambient lighting, it would be a problem. You wouldnt want a setup where you can only watch at night.
Unsightly wires are also another consideration, specially if you will run your component cables from the front to the PJ. Specially if you are the neat, obsessive compulsive kind a guy who doesnt want anything to be messy.
More often than not, these 2 very important factors would cause a renovation of some sort, big or small. Causing
costs to escalate. This part is always left out in the budget consideration.