Import CD Question


When buying imports, specifically Japanese, is there a significant improvement in sound verses a standard CD?

I've seen various types of Japanese imports but am confused by their desriptions.

12x12 Japan LP Sleeve?
DSD Mastering
Limited Edition?

What should I be looking for when my intent is the best sounding CD possible?

Thanks!
ronreid
Ronreid - the tiles that you list (Stones and Santana) are available in remastered US versions that sound very good. Most of the Stones are also available in Hybrid SACD versions. I would be surprised if the regular Japanese sound better than these, but I've been wrong before.
I have to agree with R burke on this one. The hybrid SACD of the Stones probably would fit your pocketbook price wise and you can find selected titles on Ebay and the gon. As far as The Fab Four if there not already out then they are coming soon their catalog digitaly remastered. I don't know how those sound though.
Does anyone know who makes Mini LP CD CASES? I heard they don't make em in the US because they're pattened. Is that true? Who makes it in Japan?