Former Miata owners? (Or anybody who considered a Miata during their Z4 purchase)

Anybody move up from a Miata to an E89?

My wife currently has an 03 Miata softtop that she loves, but might be feeling a little jealousy over the F30 335 that we recently got on ED.

Just for giggles, I was poking around on the internets for Z4s and it looks like a 2009-2010 E89 is obtainable in the low 30k range. But the flip side here is that I could buy her a brand new Miata power hardtop for the same amount. She's not really a "car" person that much so I'm not sure how much more she would truly appreciate it.

So anyhow, I'm coming here for the passion on the Z4 side. Is there a good case to go for the E89 in her situation? I'm a complete Z4 newbie, so aside from knowing the Z4 has much greater power, I have no idea how they really compare (handling, comfort, interior noise, anything else).

What do you guys think?