Abyss and Oasis are the only LFS I would bother with, have been disappointed with most others. I do agree that abyss are slightly more expensive on the fish prices however the fish tanks are always spotless, there are plenty of friendly staff around to help and its a generally nice experience. They seem to be pretty decent with regards to prices on dry goods too.
BAS is OK for dry goods but have found them to be expensive, the shop is always a mess, the staff are unhelpful and the presentation of the shop is crap.
Since I started this hobby last month I have been to most of the shops in manchester, Abyss is a 30 minute drive from me so not too bad and I don't mind paying extra for a nice experience.