I think their first album 'Motion' is good, a particularly strong track is 'Channel 1 Suite'.
'Every Day' put them on the map though, 'All things to all men' with Roots Manuva being the obvious stand out, but there are many others.
I haven't listened to much of the later material.
I have 'Live at the Albert Hall' as well and that was a really big deal for them, I think the first band of its type (on such a small label) that had played there. I think you had to be there though.