Considering that your telephony serving exchange (NIHB) is classified as "Market 1" and does not have any LLU presence but your head-end exchange for a G.993.2 service (NIBA) is classified as "Market 3" you probably will experience the elevated price scenario with Plusnet. Also the Plusnet service has gone downhill over the last year and a half, from reading the comments of their customers. So I would rule out Plusnet.
Origin are still a bit of an unknown, to me. So "be cautious" would be my comment.
EE served you well . . .
A&A have been described as a "strange company run by a strange man" but if one can cope with the little eccentricities and the hefty price then they would be first on the list.
Sky. Murdock family. Enough said.
TalkTalk may or may not be available to you. It depends upon whether the service availability is based on the status of NIHB (no) or NIBA (yes). I've been with them for nearly ten years and have had no problems with their service.
BT Consumer . . . what could I say? Er . . .