What is your source going to be?
I picture a nice dorm system with a pair of black horn tweetered bookshelfs {horns are resistant to drunk people touching them, and they dont need a ton of power to get loud, plus they will play loud for long periods of time with ease, some other tweets don't like that}...
Something simple for an amp, either a integrated or a stereo receiver, even though you want to upgrade to ht later, I would buy a stereo receiver now, avr's are hard to use {harder than a stereo receiver or i amp, just take a peak at their remotes}, they dont like playing loud level s for long periods of time, and it will be outdated in 2 years anyway, at least you can sell your stereo receiver or iamp..
Definitely get a sub...
I personally would be thinking along the lines of...
Hybrid 2 Packages the hybrid2 system in 2.1 around $925, the speakers are horn loaded the sub is on the bottom, so the chances someones destroys your system is less likely...
For an amp I would grab an audio engine d1 dac $170, then plug that into a mini dsp $105
MiniDSP 2x4 | MiniDSP , then plug that into a UPA 200 $315
https://emotiva.com/products/amplifiers/upa-200 That would cost you around $600 for electronics, but resale value would be high when and if you wanted to sell it all... I seen them items add up to $550 used, lol...
DENON DRA-697CI AM/FM Multi-Source/Zone Stereo AV Receiver | Accessories4less is another good choice, a little harder to get rid of later though and I don't think it will sound as good as the d1 dac plugged into your pc and the mini dsp crossing your highs and lows...
AND THAT WILL BE LOUD, you will have 250 watts pushing just mids and highs to a set of 92db sens bookshelfs and 250/1000 watts of bass to help it along... You need louder than that you will need a pro system lol..