This is a great discussion! Thanks for kicking it off, Tubetec.
My band is going through all of this at the moment as well as we're releasing our debut full-length in a couple of months, and for us it comes down to reach. With direct sales from the website, you keep 100% of what you take; with any other route, you pay a percentage to a distributor. However, as Whoops says, potential customers will be (much) more likely to search out the music on their channel of choice, probably via apps they already have, and your opportunities to direct them to an artist website will generally be very limited. So, for us, it came down to 100% of almost nothing vs some percentage of something!
There's also the "casual customer" effect, where some distribution channels will suggest similar artists or have options for you to browse genres. By way of illustration, we've had our debut EP available for direct purchase on CD on our website for some years - we recently added it to Bandcamp as well, and have sold more copies there in a fortnight than we did on our site in the last three years! ;D
On crowdfunding - I'm not convinced that's super viable these days for funding a music release. I know personally quite a few independent artists who've run crowdfunding campaigns over the last few years, putting in a lot of work and doing everything "right". None of their campaigns were successful. Maybe if you've got a decent and dedicated fanbase already it would be a different story?
I do agree on the CD quality point - CD is generally my preferred format, and if I rip to my phone I use wav. The vast majority of customers will go with MP3 or streamed equivalent though, so for us as a band it makes sense to offer that as an option so as not to exclude potential customers - while making sure we can cater to those who want a more HD listen.
We've found Bandcamp is a good middle-way, as they also offer high resolution audio downloads (cheaper and less risky than a posted USB key) - plus their artist payments are way higher than most distributors. We're ppanning to direct people to Bandcamp in the first instance for CD and digital sales, but will also have the album available on the usual suspects (Spotify, iTunes, Amazon, Google Play, etc). We've used CD Baby in the past for that digital distribution, I think Bandcamp can possibly do that as well though these days so it may make sense to have a one-stop-shop.
Lots to think about these days. Good luck with the launch!