1A and 1K are fine. You might condsider which side will cop most of the sun as things can get pretty warm when trying to sleep with the sun on the other side of the lowered window shades. The cabins are too warm and I cannot see how anyone can sleep with the sheet set and blanket over them. Only slight drawback of row 1 is the lack of overhead bins for carry on luggage. We had to "impose" on the nice people in row 3 to share their overhead bins last night. At least this was not the land of the free (AA territory) with everyone with roll-on luggage that absolutely filled the bin space!

As for seating, we were on paid D but used UC to get Z seats. We got what we asked for (but this was a few months out from flight date.