Well....
The first 3 (Shades of Deep Purple, The Book of Talysman and Deep Purple) albums were all remastered and released with bonus tracks. If you dont own these albums, they are quite good. Nothing like In Rock though. More kinda 60's prog. They do a real good version of Help and Hey Joe.
Then Roger Glover took up the task of remastering the original Mark 2 albums. In Rock was ofcourse first. This one has a few bonus tracks (One is a studio instrumental jam called JAM STEW which is really good). It also has some alternate takes and things like that
Fireball was next. This is my favorite of the remasters because it just has so many extra songs on it that never made it to the original album. Songs such as I'm Alone, Freedom and Slow Train are all very worthy additions as well as a bit of a medly and even Jon Lords spooky backwards piano solo.
Next of course is Machine Head. This one has remixes and shit and also the original studio version of When A Blind Man Cries which never made it onto the album. Great song. Interesting to compare the way Steve plays it with the way Ritchie Played it. I spoke to Roger Glover about this remastered album earlier this year when he was in Sydney. He said this one is his favorite of the lot and he was kust blown away when he heard the original tapes after 25 years. He immediately spotted how and where they should be fixed up. He said this one has the most diference from old albums to remasters
Made in Japan is Next. First cd is the original remastered. Second CD contains Blacknight, Speed King and Lucille from 1 or 2 nights after MIJ was recorded. They decided to use the other versions obviously for the original album, so it is good to finally hear what the other nights sounded like.
Lastly is Who Do We Think We Are. This one again has the full album of remasters as well as bonue mixes and the very experimental PAINTED HORSE. Apparently Ritchie hated the way Ian Gillan sang this song and refused to put it on the album. I don't mind it at all, but wouldnt call it a classic.
That is all that has been done. Roger was going to remaster Burn, Stormbringer and Come Taste the band, but decided against it because he didnt play on them and felt that he had no business to do so. EMI have said that their remasters are on the way, but nothing has been set in concrete yet