I like comics because the art is fun and the stories are compelling, not because of the smell, or the clutter they create.
FYI Vigo, a CD is digital music, somebody has just burned it on a cd for you and inserted a snazzy little boolet for an obscenely high processing fee.
I think its awesome that I can get whatever I want from the comfort of my living room. The times we live in are the BEST, I can get whatever I want for a price I feel comfortable with instead of being at the mercy of the a-hole who used to run our local comic shop.
Correction.... a CD is uncompressed digital music. What you buy via download is compressed digital. So the only way to get a prefect copy is to buy the cd. That is until itunes allows you to download wav files.

You'll also find that a physical cd costs the same, sometimes less than buying every song via download. I get the feeling you haven't been in a music store in a long time. The average price for a cd is 12-15 dollars. And a typical song is around a dollar right? In general a cd has 12-15 tracks.... like I said they are about the same.
Just as an example I looked up LMAO online. It costs around 10-12 dollars in cd form and it has 14 tracks. The mp3 download version of the whole album also costs 12 dollars so you can actually save money by buying the cd version. Even if you don't you get more with the cd version (nice case, liner notes, ect).
Brining cds into a comic book argument doesn't really make any sense though. A full color, full resolution scan is the same thing regardless of if you prefer to hold the printed pages in your hand or look at them on a screen.
Personally I prefer digital comics because comics lost all collectable value in the 90's, they are fragile, and they take up a lot of room. I do have some old comics stored in a box somewhere, but I don't read them... if you read them then they get damaged and it ruins the value, so if you are into actually reading comics as opposed to collecting them, digital makes much more sense.
It's kind of like collecting video games. It used to be fun, but then again games used to be in cart form, and they came with really cool boxes, manuals and extra stuff like maps, ect... Now all games come in the same dvd case, the disc is usually mono colored to save money and the manual is a single page with a URL to where the online manual is. Comics just aren't the same, sadly.