Hello all. I hopefully have a simple question for everyone. How hard/what is involved in switching out different projector units? I am going to be building my house soon with a dedicated HT and I have a budget projector at the moment (Optoma HD20) that I have used, but never actually mounted (I think it is a great unit for the price, but I don't have anything else to compare to). I would like to go ahead and mount the projector when the house and HT room is being built, and later save up for a higher-end unit. I would rather spend my $ on better subwoofers then buy a high-end projector right now. I have seen there are projector calculators to help you mount the units for optimum results etc. So my question is, if I mounted the Optoma and ran the cables etc. accordingly, and then switched to a different unit, would I possibly end up needing to mount the new unit in a different location? Thanks for all the guidance and help. If it is too much of a headache I might just get the higher-end unit now and switch the subs out later.