Paul wrote:
snip

I have switched to a nicer roller since, but it leaves a
different texture (if you look at it closely).

snip

Tried out Floetrol additive on a recent large paint project, and the
improvement in finish on the (ahem) low cost latex was very surprising.
Most paint departments will have quarts or gallons of it in stock. With
a good roller with the proper nap and Floetrol you ought to get a nice
smooth result. Sometimes going to a lower gloss, like eggshell intead
of semi-gloss will be more pleasing. HTH

Joe