The solo album is worth getting but Spirit of Eden is probably my favourite.
I'll look out for it. I love Spirit of Eden for its completely stripped down spaciousness.
But Colour of Spring is the one that I always come back to, largely because I bought it when it came out and it has been part of my life (It's my life!!) more than the others. I also love how they decided to add in all those 'real' instruments - to actually want to listen to a song with banks of recorders says something!!