This is not a direct answer, but
is availability of the Afternic and Sedo registrar networks important to you? Currently, your names at Namecheap have Afternic access and your names at NameSilo are eligible for both networks.
Of the registrars you are considering, Sav and Dynadot are eligible for both networks, while Porkbun support Afternic. Right now at least, Spaceship support neither. I don't use Cosmotown so not sure the situation.
Also,
is it important to at least have the option of having a lander and listing at a registrar marketplace for occasional sales that way? For example for buyers who want the name instantly and automatically, or for sales during 60 day lock. It may not be, but if it is important NameCheap, NameSilo, Dynadot, Sav and Porkbun offer that.
When you transfer, while certain TLDs (like .org, .xyz) have a
transfer lock imposed by registry/backend that as far as I know can't be removed, for .com and .net on transfer some registrars will waive the lock, and others will not. Again, in long run may not be important, but a consideration.
Just to make sure your price comparisons are what you would pay,
Dynadot have bulk and super bulk. I think right now they have a promotion so everyone gets that pricing, though. To get in bulk you just need place $500 on account balance. Need $5000 on balance or annual spend to get to super bulk.
Coupons can change pricing, and both Namecheap and Dynadot use coupons regularly. Usually on registrations, but sometimes on transfers or even a monthly slight reduction on renewals.
Also, at
NameSilo there is different pricing, now significant for some TLDs, if you have activated their
discount club that require you to put account balance in $50+ amounts. So if going by TLD-list, which will show pricing without that on, can seem higher than it really is.
You don't have a huge number of domains to manage, but the
interfaces are better at some registrars than others, and with bulk tools. For example, if you do decide to go to Dynadot you can set it up so that your TXT verification codes are automatically added to all transfer and new registration names, if you wish, and can set up the nameservers for your common places to sell (NameSilo also have this feature, and a number of other registrars).
If you do move your names, remember that you
need to update the registrar information at Sedo, and that Afternic FT will notice the move and in general you will need to
relist and reapprove Afternic FT names at your new registrar. Dynadot have the easiest way to check, activate and remove from the FT networks, in my opinion.
I use all of Dynadot, Porkbun, NameSilo, and Namecheap from your list (+9 other registrars
) and plan to continue to use them, so I am positive on them. Just listing here some of the considerations that may, or may not, be important to you. Congrats on working out the total price difference in options, the right way to look at a potential move, but also need consider factors such as above.
Bob