so any guys would like to give me advice? it would def help
It's hard to say for a number of reasons. There are choices left to the individual. For instance, some people love doing up the room, even perhaps theme based, but the components being used are not of highest quality. Then there's someone like me who would be fine with a black cave, especially if that gave me higher quality components.
I am apprehensive that $10k can get you BOTH a nice room, and nice components, ESPECIALLY if you're hiring out your work. DIY, you have a chance, and that includes both the soundproofing as well as speakers/subs.
So, I'll leave the room to you.
Audio starters:
Room, set it all up lengthwise, symmetrical as far as sides. Keep viewers away from any boundary, if possible. 38% or tad less of room length distance to your ears, doesn't matter front or back wall. This is for the sweetspot (multi rows gets into a whole different ball of compromise wax).
Video starters:
dark dark dark is best best best. Kill all ambient lighting, if daytime viewing is important. Rope lighting and stuff like that, well I don't like it since it compromises performance. Fiber optic stuff for the ceiling "stars", well that's a lot of work, and I'm not sure how much money.
Use this calculator for finding right screen size for distance. Again starting point, then you eyeball it for preference. I like it big, especially since most of my stuff is in 2.35 AR. (edit #1, use 36 degrees, aka THX rec, as your starting point.)
http://myhometheater.homestead.com/viewingdistancecalculator.html
To know if any PJ is going to be bright enough for the size, find real world lumens (look for reviews, not specs), then divide that number by the square footage of screen. That gets you foot lumens (edit #2, really called foot lamberts). You want a target of about 16 FL. Brighter for others, but don't go too much dimmer.
other decisions for you include number of viewers, and how you're going to decide on number of speakers and where they should be located.
So, while this isn't rocket science, there's a lot to think about, if you want to do it right the first time. Few do it right the first time, and that's me included, though I tried and succeeded in some ways (and perhaps failed in others). Everything will be like that though; it seems one decision always compromises another.
Peruse this subforum to see build threads. Remember to pick your jaw back up time to time.
http://www.avsforum.com/avs-vb/forumdisplay.php?s=&daysprune=30&f=19