need recommendations for a new binder

my 4 year old gc2b died on me and i’m freaking out since the quality is so bad, meaning i need to branch out, and i’m terrible with making decisions. i was wondering if i could get some help/advice?

im pretty thin, 5’7, and around a 30b? never been measured. my gc2b size was in between the small and extra small, but the small fit better.

i dress in tight clothing, so being very flat is important. i also have issues with spillage/puffiness at the side of my binder, so higher coverage is a need.

i’m stealth, so binder lines are not desirable. i’m fine with full tank binders. just need to be flat lol

i tried an underworks tri-top once and had the issue of collar sticking out. it was also extremely uncomfortable, even after breaking it in.

if anyone has a good recommendation please share! i’m desperate!