5 Speed Gear ratio advice?

If you really want to see how those ratios work, graph it out.
On the vertical axis,plot rpm, just 6 equal divisions,( each about 1.5 inches high) along the left side, with zero on the bottom.
On the horizontal,across the bottom, starting from the left side, plot speed in blocks of 10mph,(about 1 inch wide), by using 11 equal divisions, to represent a total of 110 mph. This will fit on a standard 8.5 x 11 sheet.
Then using your chosen rear gear, calculate the speed in each transmission gear at 5000rpm. Next plot those mph results on the 5000 rpm line.Next draw a straight line from each of those points down to the zero-zero corner.And finally, drop short verticals from each point on the 5000line, down to the next closest diagonal line.
You should end up with a sawtooth looking thing,that represents your rpm drop in each gear, from a shift-rpm of 5000.
You can plot as many graphs as you like with different shift-rpms , and using other rear gears.
When you study that graph, you can instantly see at what rpm you will be in any gear, at any speed.
So take a different colored pencil, and plot points for 30 mph in first, and in second. Also plot a point for 60mph on any line that hits about 5000@60 give or take. Also plot 65 mph on the highest gear line.If you have a higher than 65 mpg speed limit, then plot that point also on the top-gear line.Those are your important targets.You can plot additional points that are important to you.
If it doesn't hit the targets you want, make a new graph with a different rear gear, until you hit the most targets, the most satisfactorily.
After that, work it out with the other transmission, to see if it's any better or any worse.
In this way you don't have to take anyone's word for which one is best for you. And you have the best chance of getting the right one for you.
The graphing business also works for automatics, but you have to throw in a fudge factor for convertor slip.
Here is your formula;
MPH= (RPM x TC)/ (1056 x R1 x R2)where;
TC = tire circumference = (Pi x D) and Pi=3.1416. example; a 28"tire is 28 x 3.1416 =87.96
R1 is the differential gear, and
R2 is the chosen transmission gear
The fudge factor for automatics is the convertor slip which is generally assumed to be in the range of 5 to 8 percent. You just subtract that % from the rpm, prior to beginning the calculation. Example for a shift rpm of 5000 I subtract .05 x 5000=250, so Then I enter 4750 in the spot reserved for RPM.
Example
I'll work one out for you, my A833
The ratios are 3.09-1.92-1.40-1.00 ..
The mph points at 5000rpm would be;
For top gear; Mph = (5000 x 88)/(1056 x 3.55 x 1.00) = 117mph
For first gear; Mph = (5000 x 88)/(1056 x 3.55 x 3.09)= 38mph
The in-betweens are 61 and 84
for a procession of 38-61-84-117 So those are the numbers I would plot on the 5000 rpm line.
Have fun!