Depends on what you are gonna use it for.
Installing custom firmware on it so you can play any downloaded games? You'll need a switch classic.
Battery life? Switch classic < Switch Lite < New Switch
Screen is a bit smaller, but it feels like a true 'pocket system' with the smaller size. Original switch always felt like a tablet with benefits, to me. FIne, but.. just a heavy controller, of sorts.
(The DS/3DS feels like that, too. Fine to hold with both hands, but weight-fatigue sets in when trying to solo-hand it.)
New plastic feels better, IMO. I wouldnt trust it to survive a 6 foot drop or anything, but it feels just the tiniest bit less flimsy than that 'tablet plastic' that the original has.
On a sidenote, funny. "I know its stupid to sell and buy it again" and your name is yoyo. heh heh