Sooo hard to choose!
I have a 1947 Featherweight; an ancient non-working White in a cabinet; an old White which came to me in mint condition as if never used, I replaced the rubber components and it sews like a dream (also in a cabinet); A Juki 2010; Bernina 210; and a Bernina 230: and a Bernina 560; a Bernina serger
I wouldn't want to choose but I think the Juki mid-arm and the Bernina 230 would satisfy my needs (but don't tell my husband!)