I would get the Pioneer Elite HD PRO FPJ-1 if my screen size was under 100" right now. It is being discontinued by Pioneer and exceeds anything else you listed and for the money is a great deal. It can be had, NEW, for under $3K.
For a screen, you can spend more on Da-Lite or Stewart, but why?
www.carada.com has screens which are of phenomenal build quality, and have been favorably reviewed by sites, for a good deal less money.
Receiver and speakers is a HUGE mess. You have hundreds of options for receivers, and thousands for speakers. There is no 'best' really, but more of what you like the most. IMO, you don't go wrong by getting a Denon AVR-2309 or 2809 receiver in a prettty standard setup.
Don't try to buy everything from a single manufacturer. Buy the best value in every category.
For sound proofing, insulation is generally 'poor' at best. There's just to much free space in insulation and not much real isolation available. Double drywall with Green Glue between is one of the better ways to achieve better sound isolation without breaking the bank. Dejoining floors, walls, and ceilings is also a good way to bring sound levels down.
A lot of your budget will depend on how much work you are doing yourself vs. having others do for you. I typically look at a fully installed 5.1 home theater system with 1080p projector, and fixed screen with remote & Blu-ray to be right around $10K installed. But, it runs about 40 man hours to install, so $2K-$3K are going to be for labor. If you DIY you free that money up for better equipment.