@mlenow here are some I can think of off the top of my head. I’ve limited it to ones that will provide a full refund. There are some additional ones that will charge a restocking fee. You may be responsible for shipping in some cases, but I think that’s pretty fair.
There’s also Music Direct. They offer a
60 day satisfaction guarantee on most equipment and accessories and carry a bunch of brands.
You mentioned World Wide Stereo and they have a
60 day money back guarantee also. So you could choose to order something for delivery instead of driving 70 minutes. Although spending a couple hours driving in order to spend several hours listening to a bunch of different stuff at once seems like it could be well worth it. And you could then try a few items at home to decide for sure.
Likewise, I bet a bunch of smaller brands, particularly ones who sell Internet-direct, would be happy to accommodate you in some way if you’re upfront about wanting to try something out.