If you're looking into things, then the
'Plastic Box' compilation is an affordable monster, with all of their stuff in the proper order.
Track Info:
The only previously unreleased track on the box set is an unused LP remix of 'This is Not a Love Song' from the 'This is What You Want...' sessions. (Incidentally the track was picked accidentally by Virgin!).
However, the set also includes the Radio 1 John Peel Sessions 17.12.79 & Mark Goodier Live Session 25.2.92 which had never been officially released.
The set also includes a selection of B-sides, rare tracks & mixes that were previously unavailable on CD (eg; Death Disco 12" / Pied Piper / Selfish Rubbish & Criminal).