Cdwallace, you will not find any objectivist charts to show you the difference between digital and analog. If that is what you are looking for, it doesn't exist. If you would rather not be bothered with analog, that is fine also.
I concur with Mike, music is art, and cannot help but be judged subjectively. There are no charts to explain why someone prefers a Van Gogh over a Picasso. No charts to show why someone prefers chocolate over vanilla. No graphs will show why one prefers a convertible over a hard top automobile. If someone claims that driving with the wind blowing through ones hair is the best way to drive, should he have to provide scientific evidence?
Loosen your collar, live a little. If you do not have the funds for both, choose the format that suits your lifestayle best. Then just relax and enjoy it.
My system is not nearly as SOTA as Mike's, but I do have a fairly balanced budget between analog and digital. My digital rig is about 2/3 the cost of my analog rig. I also listen to digital 75% of the time. However, I, and everyone who has heard my system, even non-audiophiles, believe the analog sounds better, more-involving, than digital. I have no charts, but I and others talk less and listen more when analog is playing versus digital. I have no color charts to prove this, or explain why, it just is.
So why do I listen to what I claim is inferior sonically 75% of the time.....good question, Iask myself that often.
The answer is two fold, first, digital has analog beat handily in the convienience factor. I'm either busier (multi-tasking) or just lazy sometimes (70 min play times vs. 20 min), or sometimes it's software that I don't have on vinyl. Secondly, my digital system does sound very good, it's not exactly a Best Buy special. One only notices the shortcomings when comparing directly to analog. I'm only dissapointed in my digital system if I try to switch to digital immediately after listening to vinyl. If I'm just in the house, and reading or working, and fire up the rig with digital, it sounds great.
Maybe you are best just to go with digital. Many do, for the sake of convienience and/or $$$. If you don't have the analog to A/B for yourself in your own system, you will probably never know any better and save yourself some dough.
Cheers,
John