Seeing as though they've been bought up, I've never kept it hidden that Tackle Warehouse is my favourite store. From my experience, they beat all the Gold Coast stores 'hands down'. That said, I'm there on an almost weekly basis!
But seeing as though we're talking about the Gold Coast.....
I've never had good service at the BCF at Harbour Town, but I drive past them almost every day on my way to work, so I often stop there to get some gear every now and then. I know other people rave about them, and I'm sure it's all about who's working when I'm there (always at the same times, with the same staff). Based on other peoples reports, I'm sure there must be better staff on the days that I'm not there.
Sporty's I've only been to a few times, their range seems fairly small, but they genuinely seem keen to help, and that counts a lot in my books. I'd use them more, but they're a little too far away from me.
Go Fishing/Nerang Disposals have a great range. Not the frienliest bunch, but thats OK when I know what I'm looking for. That said, I recently bought some DOA Chug Heads (as they seem to be the only people I've found that carry them), and the young guy there had no issues what so ever taking time to answer my questions and to show me how to rig them... and it was the only time that I really required some 'customer service'. And thier prices are pretty good, and they have a great range of stock.
Doug's is the store that I frequent most regularly on the coast, and they're just down the road from work. They have an excellent range. I do agree that their prices are a little on the high side, but their customer service is outstanding. I'm normally in there at the same times on the same days, so the guys working at those times tend to know me and give me a discount. If I get served by someone thats 'unfamiliar' I lose the discount, but the service is always good. I don't mind paying a little extra for good service when I need it.
Cheers!