Welcome to the forum, RC! I have not heard any of the speakers that you mentioned, but I do have some comments.
I have never heard or read anything except praise for Aperion, both their products and the company. My friend has a 5.1 set that he bought about ten years ago, and he sure likes them. The excellent reviews from people (including members here) give me confidence and trust in their company, so I would have no hesitation in taking them up on their 30-day no-risk trial. The best place to audition speakers is in your own home, and Aperion lets you do that with no risk or financial commitment. You can't beat that.
B&W is also a good company with plenty of fans, and there are members here who have experience with their various lines of products. Hopefully some of them see this and chime in.
I own an SVS sub (the PC13-Ultra), and am very happy with it. No product is perfect, but the performance of this sub is spectacular, IMO. The company and their customer service have been top-notch from my perspective. In my years of reading about the company on the web, I've seen one negative review of a product...and many, many positive reviews. I believe that they are upfront and honest, and they'll let you know which sub that they'd recommend for your size of room. With your budget and your size of room, I'd lean towards an Ultra if it were me.
I don't have any personal experience with ED and can't give any good input.
I'll take a look at your receiver and the Aperions to see if I'd recommend an amp.