Gear ratios and driveability

Heck I’ve got 3:23’s and 225/60/15 tires (around 25.6” tall) and I don’t even like doing 70 for more than a few minutes. I have notes at home that I took down the other day, noting the rpm’s at 40, 50, 60, and 70. I believe 70 mph was like 3450 rpm.

I’m considering two options, because I’m on the highway a lot. Install a set of 2.94’s or even 2.76 gears, although that’s going to kill my around town performance.
Or option 2 is to install an A500 tranny for the overdrive. And maybe 3.55 gears, which will give me good performance around town, and make it cruise very comfortably on the highway.

Of course option 2 is a lot more expensive and a lot more work. I just feel like there really is no good compromise on gearing unless you throw in overdrive.
I've got a 4 speed, and like I said, I love the car the way it is. I just wanted an explanation for my questions.