I'm looking to build my first home theater setup and am looking for suggestions on speakers. I plan on eventually upgrading to 5.1.4 in the following room: The ceiling height is 6'9" and I will be using upfiring for atmos. My budget is ~$2500 for everything. I don't need everything at once; I can wait for sales and start with a 3.1 setup. This is my first time buying an A/V receiver and speakers. I'll be using it for movies/tv and some gaming; how they work for music isn't of importance. One problem I'm having with my current setup (soundbar) is that dialogue sometimes get muddied and I am looking to remedy that. From my research here's what I'm leaning toward: A/V Receiver: Onkyo TX-NR787 ($650): The only 9 channel receiver under $1000. If this won't work then I rather give up the rear atmos and set up 5.1.2 rather than pay over $1000 for a receiver. Front/Center: Elac Uni-Fi UB5 ($500) and UB6 ($350): I know these speakers are the most important so I wanted my greatest investment here. I've also considered the Elac debut speakers but the UB5 are sometimes on sale for $350 making them only $100 more than the debut. Front Atmos speakers: ELAC Debut 2.0 A4.2 ($230): These match the UB5 and also the debut if I had to downgrade. Rear Speakers: Pioneer SP-BS22A-LR ($200): These have atmos included and I figured this would be the place to save money. The other option is the Pioneer Elite SP-EBS73 when they go on sale for $350. Sub: ELAC Debut 2.0 SUB3010 ($450): I'm not sure with this pick and this is where I need the most help. There's so many subwoofers that I just went with the Elac sub to pair with the Elac speakers. I'm looking for something that would work given my room size and pair well with the speakers. Ease of calibration would also be a bonus. Any recommendations/advice would be greatly appreciated. As I've said this is my first time purchasing an a/v receiver so I don't want to overlook something.