Hi mate....
I have a 182 without cup pack and would say its far from a tame version of the 182. I have driven a cupped 182 and from what i could tell, there was hardly any difference. However, someone who has owned both might be able to advise you better.
The non cups IMO handle very well, corner with no roll and are still very firm.
I had a nice little blast on some b roads with a 172 cup and stayed right behind no problem.
The reason i got a non cup one was cause i wanted titanium with the silver, non grey alloys so went for it.
However, If you want the darker alloys, which most people prefer then i would say buy the cup. Only difference will prob be noticable on track and sits 4mm lower lol.
As for the cup spoiler pack..... i'm trying to find a splitter and rear spoiler off e-bay.
Resale: Probably better chance of selling with cup packs and maybe better value...not toosure.
All are great cars, but if you do want the (spoiler) looks and a little extra handling.... i would say cup.
Good luck mate.