Imo the best CDs are audiophile gold-plated discs such as Mobile Fidelity Sound Labs (MFSL), Digital Compact Classics (DCC) and Sony Mastersound. Unfortunately, most of these are long out of print from the 90s, and carry some pretty hefty price tags on eBay. MFSL also pressed many jazz, classical and easy listening aluminum audiophile CDs in the 80s before they started pressing golds. Almost every one of the hundreds of titles from these three manufacturers are the best redbook CD recordings ever made. If you're interested just search eBay music category for MFSL, DCC or gold CD to see what titles are available at any give time, but beware of cost since many have become rare collectibles that keep increasing in value. Some of my favorites are the Pink Floyd gold CDs. Another great source of audiophile-quality redbook CDs is to look for the titles you want on discs made in Japan which are also quite collectible and can get expensive for various rare pressing. I've converted over 90% of my U.S. made disc collection to audiophile gold/aluminum and Japanese-made discs, most are rock and blues.
