Question What's the best PC case which has these specs ?

Narrow list. 🤔

Corsair, pcpp: https://pcpartpicker.com/products/compare/8Y3RsY,sNJwrH,x3Crxr,Rwhj4D/

Personally own 760T and 750D.

Be Quiet!, pcpp: https://pcpartpicker.com/products/compare/Mn648d,CmDzK8,bQ8H99,NVZFf7/

Phanteks, pcpp: https://pcpartpicker.com/products/compare/cMR48d,mn3RsY,DXXfrH,TbhKHx/

All listed cases have at least 2x 5.25" external bays and support E-ATX MoBo.

ARGB can be easily added by any ARGB fans.

Dust filters (aftermarket ones) can also be easily added, either by buying Demciflex filter kit for specific PC case, or buying standalone filters.
E.g;
Corsair
780T filter kit: https://www.demcifilter.com/corsair-graphite-780t
760T filter kit: https://www.demcifilter.com/GRAPHITE-760T - have that kit
750D filter kit: https://www.demcifilter.com/OBSIDIAN-750D - have that kit too
900D filter kit: https://www.demcifilter.com/OBSIDIAN-900D

Be Quiet!
Dark Base 900 Pro filter kit: https://www.demcifilter.com/be-quiet-dark-base-pro-900

Phanteks
Enthoo Primo filter kit: https://www.demcifilter.com/ENTHOO-PRIMO
Enthoo Luxe filter kit: https://www.demcifilter.com/ENTHOO-LUXE

Filter kit installed on Corsair 760T

pNLeaxc.jpg


Filter kit on foreground, for Corsair 750D

BaS5O0M.jpg
 
Welcome to the forums, newcomer!

You didn't specify your budget, location or preferred site for purchase but here's my suggestion;
 
Welcome to the forums, newcomer!

You didn't specify your budget, location or preferred site for purchase but here's my suggestion;
I have a question: Where this case has 2x 5.25" external bays OP needs for their Blu-Ray reader and writer? 🤔 I see none.

Edit:
It was hidden in the basement. 😆