I think Bloomsbury is a good alternative to Speedy B 25. It seems like the Neverfull would truly be a great addition to your collection!
It is a very difficult decision... I've tried Eva in the store and I loved it, but I think it would be too casual for formal events - and for non-formal ones I already have the NF pochette in the same print.
I've pictured the Favorite MM Mono as a summer alternative to Speedy B 25 DE - I like that it's less bulky and it should fit my Clemence wallet + it could work as a clutch for dressy, but not formal events. I don't think I mind the magnet closure that much as long as it can keep the bag closed.
PA is stunning, I love the fact it stands up on it's own and has an interior pocket and I even like the short strap it comes with - I usually carry my bags as shoulder bags (even with long strap) rather than crossbody. I like it in epi noir, because I think it would be great for formal work events. My only downside is the silver hardware - I do prefer gold, even though I'm trying really hard to talk myself into liking silver... Of course I've also considered it in DE as an addition to my NF, but again, having NF pochette already, it's not something I absolutely need right away.
I've been back and forth on Pochette Felicie, as I've always been scared of Vernis, but Amarante seems very elegant and IMO it's dressy enough for formal events. I like that it's not plain black - but I have hard time picturing this colour in real life as on some pics it looks black, on others red and on others purple. It's really confusing. If it looks good IRL then I think I will get that one first, as I have no formal bags now... Besides, I love that you get so much for that price: it has the additional zipped pouch and card holder (which I could later use in my other bags) and it has a chain which again I could use with any other small LV bag that I'll get later on (Pochette Accessoires or Eva Clutch).