Yes they are quite harsh for the Irish roads.
I own and use these also.
Despite their spring rates (4k front, 6k rear) they don't have much give, most likely because they have no adjustable damping, just one (hard setting).
You'll find they will do quite well on the track but there are better coilover setups out there obviously.
Mark have you tried your BCs on the softest setting? Im was thinking of getting some but surprised to hear you say they arent much better in the comfort department.
Joz