I had a B17/YS1 short geared transmission in my DB1. Acceleration was a little bit better and faster then all of my other friends' DA's and DB1's because her revs will shoot up and down significantly quicker then the standard LS transmission (I also paired it with a Exedy stage 2 clutch and fidanza 7.5LB Flywheel). While it was neat with the tachometer dropping down to 0 between every shift and quicker acceleration, I paid for it in gas mileage... She devoured gas because the RPMs stayed high on the freeway. To the point where my passengers who were somewhat car savvy would flip out that the RPMs were so high thinking something was wrong with it... I don't remember where 70-80MPH was on the tachometer though since it has been 3 years.
If you don't use a lot of highways or can afford worse gas mileage, Go for it if it's legitimately in good condition.