I would go with BB or FS...try it out and return it if you dont like it.
I bought my Vox at BB last year for that very reason, and even got a price adjustment when they dropped the price by $20!
The biggest advantage to buying at Chapters is that they MAY exchange it for you if you have a warranty issue (rather than shipping it out east and waiting for kobo to fix or replace it). But that tends to be up to the store manager. Also, I don't know what sort of legal relationship Kobo has with Chapters since their sale, so maybe you can't even do that anymore? I'd be curious to know if anyone knows the definitive answer to that question!