Flygirl,
To add to the comments above, welcome to the ERA family!
You have a great plan and as the guys said, build the car YOU want. As the build progresses, you might change a few things here and there, but the key decisions that are not easily changed are color, body features (scoops & cut outs) and dash configuration. Sounds like you have those well thought out.
One hot topic around here is roll bars. For a street setup, none is the way to go
Some folks have gone for the traditional single roll bar, some with dual roll bars and yet others with a full width roll bar set up ... I have a unique setup on ERA 2136 that allows for a single or full width roll bar
What I would suggest is to consider having ERA weld into the frame, the tubing and mounting points for whatever roll bar configuration you might want in the future, maybe even have them make the roll bar and fit it to the frame. The whole setup will be powder coated and will fit just right.
Then be sure to tell Peter ... DO NOT drill the body for the roll bar, just leave it in pure street mode, NO roll bar. Down the road, if you decide to race the car or just want to have a roll bar, all that needs to be done is to have the body drilled and you are done. A small investment up front and a real savings later on if you change your mind.
Now whether you go for a single or double roll bars ... that's up to you