This car wouldn't suit T-Tops. I think you'll likely be offered just a coupe or a full convertible.
To be honest, I think I've probably taken the T-Tops off my 300zx about 5 times in 5 years - and that's not just because of our crappy English weather
T-Tops will reduce structural regidity (and add weight where they add bracing), they can leak and creak too. Decent climate control is the way forward!