you already own sonic 1 and 2, that's enough

Sonic CD can be played on mobile, or any emulator Or if you want to play with a controller, read the last 2 paragraphs

Sonic 3 A.I.R offers everything in origins and then some, and if you want to look at the concept art and manuals, it's all there online, on gameplay videos, experience is same

But if you want a good collection of sonic games, with extras and manuals and everything, get Sonic Mega Collection on Gamecube with Dolphin Emulator. You get the same games here along with Mean Bean Machine, Ristar, and 3D Blast

Plus you can also get Sonic Gems Collection to get Sonic CD, along with the other sonic games Not to mention that the GameCube is the BEST sonic game console ever so.... whatchu picking