Of the suggestions presented, I lean towards the AS T25K myself.
Yes, I like the ES 25¢ as a chip better but because of the yellow base on the $5s (with a green spot there as well) I think the AS T25K would give you more contrast. Do you have a picture of your set in barrels (on the side)
@MatB ?
Having said that, when used with the black $20s, I'm not against keeping the original BTP $1s. There is something to be said about using the original imo. Just like using the RHC $1s on the PCA set. If using the $25s though, then I think I lean more towards replacing the $1s because of the low contrast.