ED 100 is a great scope...had two of the things and could not see much CA at all,in either, though it was there. The standard focuser isn't that good.
For an alternative I replaced them with a 90mm f11 Achro from the mid 90's. A bit more, and I mean a bit more CA but I'm happy
Cost all of $125, many thanks to Lars for the sale....a great small scope for Planets and G+G.
My recommendation is a 4" f15/3.5" Achro or an ED 100.