I noticed by bid does not spec the manufacturer or model for the coil
to fit in the 16" plenum for the new condensor, lines, and coil I am getting
bids on.

The bid is for a carrier infinity unit. The HVAC guy said coils change in
technology and aluminum ones are used more now.

Should I care about the make of the coil, and what are some good
brands/models? Aluminum over steel?

Thanks for your advice, don't want a cheapie as a coil.