No, no , no.
Why You need 4GB at all ??? Currently CPU7 works on 256MB, AS on 1GB, but SW generally the same. HP DL320 G6 will have 2GB.
AS is dedicated for strict needs, not for some n+1 own applications.
HDD - 160GB without RAID-1 ( not clever, I agree ).
It will be possible to have partly corresponding AS on HP DL320 G6 using redundant power supply supplied locally.
ALU support only specified HP and IBM servers without any modification.