Headroom of Gen I vs. Gen II?

Howdy,

Tried to get my 6' wife into a Gen II but she has issues with the windshield height, she claims she's looking directly at the sun visor.

Gen III she likes because you can lower the seat so that isn't a problem.

What is a problem is the $25K price tag.

So have any of you sat in a Gen I or went from a Gen I to a II?

More headroom? Less?

Just trying to figure out if the Gen I is a viable option for a tall person.

Thanks!