Short answer no, long answer yes. What I mean by that is the whole time over the last 16 years I have always enjoyed my theater and it started out way less than 10 grand. Never once in that whole time did I go man this sucks I need an upgrade I always really enjoyed it, but the flip side is when ever I did make an upgrade and seen the improvement you realize there was room for improvement but it wasn't necessary to the enjoyment just made it better. There is no reason that you couldn't spend half that budget or less and have a great system. So I started with a "good" theater that cost well under 10 Grand and now I still have a "good" theater but over 10 grand
For the record the two biggest difference makers in my theater over the years was acoustic treatments, and proper set up (not just plugging and playing) with going dual subs a close contender. The first two if your handy are mostly research and DIY so they don't even hurt the pocket book much at all.
And last my humble $.02 advice is go internet direct. I have owned good brands before (paradigm, warfedale, def tech) and to be honest they offer good product but the value at the price just can't be touched. ex: my new PSA speakers smoke my Paradigms that they replaced in every way yet they came in at the same price when the smoke cleared. It was a real weird feeling getting an upgrade like that and not having to spend more money. With free shipping in the states from most companies and some offering free trials and free return shipping you are out nothing.
All just my opinion on what I have learned over the years.
Also if your room is for mostly movies concentrate on getting a speaker with high efficiency and a compression driver. What an eye opener that was for clarity and dynamics in movies. A dome tweeter in a similar price range just can't touch it in my opinion especially when you crank it up.
Ok one last tidbit.
Just remember that skimping out now costs more later, I have lost a ton buying and upgrading over the years and selling old stuff at a loss if you can even sell it at all, especially if you get addicted like most. I would recommend buying the cheapest receiver that has the features you want. They are going through big changes right now and is the most likely item you will want to upgrade in the next few years. Spend what you have on just a few speakers for now and add as budget allows. Maybe you want to start with a 2.1 system with great speakers and a really good sub then when you get a bit of extra cash add the center, then a second really good sub. For your surrounds, Good surrounds do make a difference but they are not a place to spend a lot of cash when starting out. watch local classifieds for good deals on bookshelf's or surround speakers or even websites like A4L and others for blow out sale items. It will give you surround sound and let you focus your money on the meat and potatoes of your system the front LCR and subs. The reason I am suggesting this route is if you are chasing the sound you heard in that room with a $2000 budget your going to be disappointed having to buy all the components at once, But if you make some compromises at the start and spend your $2000 budget wisely and build off it you can come very close withough reaching the 10grand plus budget.
If you could swing 2500 I would (I am no expert)
500 receiver (go factory reconditioned to get a better model for your money)
1100 front L/R something from reaction audio or PSA
700 Sub woofer Reaction, PSA, HSU, Rythmic, I didn't like the SVS PB2000 but YMMV.
200 rear surrounds (used or blowout sale) Start with 5.1 for now and when you upgrade your side surrounds move these to the back for 7.1
Build some DIY acoustic panels for first reflection points and run a phantom center to start. It's a big room so you won't have amazing pressure and bass to start but trust me buying one good subwoofer now and adding a second down the road is way better than buying two cheaper subs now and replacing both down the road, Ask me how I know

If you save any money on the above budget funnel it into the subwoofer, It makes movies better and is what draws you in like a theater. It's weird but adding two quality subs even made my mains sound better (probably all in my head)
I would add a matching center as soon as I got some extra money (birthday, overtime, ect) Then a second sub, then finally matching surrounds.