I'm surprised nobody has mentioned some of the Ford hot hatches. Yes technically, not sports cars by definition. If you can get over it being a Ford, and don't have brand snobbery then they are good choices just like the Golf R and GTI.
I'm talking about the Fiesta ST, Focus ST, and RS. Fun as stink on the street, and get a few good laps in at the track too. I have a Focus ST 2014 which has been dead reliable, and an RS which was a hoot on the Cayuga track. Surprised me how fast that thing can take corners, and the lift off oversteer is intoxicating. Winter driving, no problem.
The bonus is they all come in manual only ?. Good luck finding one in stock form though. Others I'd consider as mentioned already. Type R, s2000, SI, 370z, g70 ( luxury though), stinger gt, mustang, Camaro,brz. A few mods and they are all fun cars without breaking the bank too much, let's be realistic.