Why pay extra for a super-short SYE unless you need it? First, you absolutely do not need a super-short SYE for your TJ with only a 2" lift. Heck the standard length SYE is fine even up to at least 5.5" which is what my TJ was at.
Why not go with a super-short if it's available? Because with a super-short SYE kit, you lose the ability to easily recalibrate your speedometer after changing tire size or axle ratio. With the super-short, you can no longer recalibrate your speedometer for $15 by just snapping in a new speedometer gear, you have to buy an expensive aftermarket speedometer calibration circuit like the TruSpeed which costs around $200.
For only 2", even 4-5", you simply do not need the benefits a super-short SYE kit gives. If you want a SYE kit, just go for a standard SYE kit and save some $$$... and save the ability to easily recalibrate your speedometer like you have now.