That’s a fairly decent amount, probably an extra thousand or two will do, considering this is your first quota bag. With regards to leather goods spendings, some SAs are more flexible than others, but one thing for certain, purchasing RTW and fine jewellry pieces will likely ‘expedite’ the process. The advantage of shopping at NBS is mostly to do with its range of products (a wider range of non-leather items for selection), however it’s understandably more ‘competitive’ to get a desirable bag as they have a much higher volume of clienteles. In any case you aren’t too happy with your current SA, you may try to ‘test’ the water with him/her again, I reckon it’s better you get your first bag with him/her before considering to switch store.