Since we are allowed to dream big:
TOS - The Enterprise NCC-1701 model. I saw it hanging in the Smithsonian and fell in love.
TNG - The sofa/captain's & guest chairs from NCC-1701-D bridge. I would redesign my living room around them... or the TV room, at least!
“When all Americans are treated as equal, no matter who they are or whom they love, we are all more free.” -Pres. Obama
"A great democracy does not make it harder to vote than to buy an assault weapon." -Pres. Clinton