I've got the 4-CD set on EMI Classics' Icon series, and I would like to know which CDs I can buy that will have new material which isn't on those CDs. I'm looking for solo material (chamber music included), not orchestral work. The problem I find is that very often the information on CDs found on websites is not too detailed, but I get the impression that most of the CDs I see out there have nothing new when you have the 4-CD box.

I must say I don't really know how much solo music Brain recorded; I think it's not much (especially compared to his hectic work with the different orchestras he played in), but I know there are pieces which are not on the CDs I already got (for example, I'd love to have Marais's "Le Basque").

I'd also like to know whether there exists any CD set which is better (more complete, better booklet...) than the one I already have. I might replace it.

Thanks!