Comparing manual trans options - variables other than gear ratios?

Ok so IMO
the ideal ratios would start with a granny-low for the dragstrip, then a normal low, then a pair of tight splits, then a deep overdrive.

I really like the 6.82-Second gear of my combo; then tight splits of say 5.32-4.15- then an overdrive around 2.70 and a deep low around 14/15. and lets put First gear at around 10.0 ; Line em' up!
14.5-10.0- 6.82-5.32-4.15-2.70.. OOps there is no such a thing as 4.15s so......
So it looks like the Final drive will be say 4.10s..
Now lets back it up; 4.10 to 5.26 to -6.74-to 10 to 14/15 and the 2.70
Putting them back in the right order, I get
14/15-10.0-6.74-5.12-4.10-2.70 and the splits are;
Ok first we gotta get a low-gear that physically fits in the box so 10/4.10=2.44 so no problem there, and 14/4.10= 3.41 so that too is doable maybe just barely. Better switch to 4.30s
so then 14.5/4.30=3.37 Ok that granny should fit in the box.
So then with 4.30s I get numbers like;
15.3-10.10-7.07-5.38-4.30-2.70 and splits of
.66-.72-.76-.80- .63od

I sorta like it;
You got your drag-strip starter, 15.3
your Regular starter; 10.10
your 7.07 Second gear (60=5300)
two more regular tight progressive splits, 5.38 and 4.30
and the deep-overdrive; 65=2180
Ok, I like it a lot. Just not enough to pay big bucks for.
Fun with math...........