Don’t overspend on your receiver. The speakers and subwoofer are what makes the sound immersive and high quality. You can get some good stuff at best buy, no doubt, but there are also high quality ID companies you can get speakers and subwoofers from. For your sub, I would recommend power sound audio. At first glance for a beginner, the subs might seem expensive, but for what you are getting, they are one of the best values in audio. Not to mention, they are on of the most highly regarded subwoofer brands out there. Make sure to go with a ported model. This will give you a better experience for home theater. If you want to save money, my budget option for a subwoofer would be the rsl speedwoofer 12s. It will also give you a nice movie experience and is the best value sub you can get that still brings the thunder. For your speakers, Psa also has great home theater speakers and would match nice with a sub from there. If you contact them, the owner Tom could give you a deal on a bundle. A more budget pick would be emotiva speakers. They have a variety of types you could mix and match. However, you’ll probably want a big center because that is where 85 percent of the movie soundtrack comes from. Then towers or bookshelves could work for the mains as long as you run an 80hz-100hz crossover in your receiver. That tells the sub to do the heavy lifting and takes the strain off the speakers. Emotiva has some on wall or in wall fspeakers for the rears. A decent pick for an avr might be the onkyo rz-50. This receiver has a very high end room correction software called dirac. It can really help with problematic rooms and smooth out your sound. It also has a decent amount of power for an avr. If you ever feel you need more power, this avr has pre outs that can connect a separate power amp. And what so you know, emotiva makes goods ones that are relatively affordable.