If you prefer comfort over handling, the A4 for sure. It's a very mature car. It's also FWD or front-biased AWD. Not a very sporty car, although I know people who would argue otherwise.
Between the Z and the BRZ, if you find them at around the same price, probably the Z. Stock for stock, it's a much faster car than the BRZ. Now, if you can get the BRZ for significantly cheaper, like 6-10k cheaper, which would be the difference in cost new, a pretty good case could be made for it. The FRS/BRZ aftermarket support is huge. Many times larger than the 370Z's in much less time, due to how well they are selling. If I were in the market now, I'd have a pretty hard time deciding whether to pay 35-40k for a new 370Z, or 25-30k for a new BRZ and spend 10k in mods from the start.
The BRZ is a little more livable on a daily basis due to having back "seats". They can still fit friends in an emergency, much easier than the 370Z's trunk at least. Best way to know if you like it is to drive it. The feeling you get behind the wheel on a nice road isn't apparent through testing numbers and car reviews.
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