In reply to floss_81:
This is a very good list. I think the number 5 is very specialist and would consider leaving it out. I have a 5 and 6 and very very rarely use them. I would get the X4 0.75 over the C4, just because the head is narrower.
I would consider not getting the 00 C3. Just because the size is covered by the 0.1 X4.
If you went for this selection (no, No.5 no No.00 C3) then you could double up on certain sizes from wild counrty heliums. Yes WC Heliums because they fit between certain size of BD Camalots.
Lets say you do not get the No5 and 00 then you could get say a 2 WC that in sizes that suit the crack sizes you climb on most. For me its Fingers to tight hands so for me I would get a WC 1.5 and 2.
What ever way you go you will have a great rack of Cams as BD are Brilliant. And lastly I have DMM Phantom colored biners for each of my cams and they are excellent.