For the money, Best set up for HT and music

I have been reading for about a year; about all the different equipment you can buy to make the sound be the best it can be. I know it sounds extreme, but I want a good starter that I can build on.
He is my history (you can skip this if you like I'll put separator in front of my question)
I'm not super rich, but I do have a crazy love for music, unfortunately I'm young and haven't had enough time to build wealth to build on this hobby. Originally I was looking for the best surround sound (5.1, 7.1) for music and home theater. I came to the conclusion after a while that the Denon 2808ci would provide exactly what I wanted and give me room to grow in the future. I figured with this receiver I could pair it up with KEF 3007 5.1 speakers. I then found that, this might not be ideal. I have picked and matched other speakers and receivers, but at this point I've read so much I've become lost. So if anyone could help it would be much obliged.
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In my (short story above if you didn't read) I originally picked the Denon 2808ci for my receiver and KEF 3007 5.1 speaker system. From what I've read though, a 2.1/3.1 might best fit my needs though for now; while optimizing my money.

What would be the best set up for 4500 or less for a nice sounding home theater and music combo. It seems seems 2 speakers, with a center and a sub would optimize the sound quality; but then others say the center won't be needed for the stage if you position the two speakers correctly.

Sorry for the epic writing, but your help would greatly be appreciated, if you need any other details I'll gladly post. By the way, the living room is 18x18; unfortunately wood floors, but I suppose I could get an area rug.

Thanks so much in advance for your help and again sorry for the epic read.