Hi Daniel,
Can anybody make any comment on choosing ISP in Dublin?
I've been using Virgin for a good while (since it was UPC) and the service has been very reliable. It's billed as 100Mbps I think and speedtest.net gave me 86 just now, on a wired Ethernet desktop. I don't try to run servers or do anything fancy, though, so I'm afraid I can't comment on how they'd be for that. Good luck!
Ben.