Superchargers are reliable...but don't seem to be as versitle as turbos. Each one has it's plus and minuses.
Superchargers are definitely reliable. I drove my Supercharged car across the country and back with no problems with a split second box for fuel management which is nowhere near as good as the Vec 2.
A supercharger should be a very healthy upgrade if you want a little more power.
What you need to think of is how far do you really want to go power-wise.
It would be a shame to go with a supercharger only to have to lose money selling it should you decide to upgrade to the turbos later on.
My DIY twin turbo system allows for no cutting of the car with an entry level, non-intercooled system(for the guys not wanting to cut the car) that can be supplemented with a water/methanol injection system.
We also have two different intercoolers available depending on what power level you will be running.
My DIY twin turbo system is capable of running T-04 based turbos(big exhaust housings to flow the air from the 488 CI greatly minimizing the backpressure) that can make anywhere from 600-1500+ HP. Whether you ever want to go that high in the power range, it is nice to know you can without having to buy another system.
The supercharger cars will run hotter than their turbocharged counterparts due to the fact that they are compressing the air anytime the crank is spinning.
Turbos only do so when they are under load.
Twin screw blowers cannot be intercooled as the screw blades pump the air directly into the intake.
The high powered centrifugal blowers have a high amount of parasitic drag and belt tightening/changing maintenance but can be intercooled via air-water or air-air.
So that is all the general information in a nutshell. Any way you want to go will result in a smile on your face when you stab the gas pedal. HOW LONG the smile lasts once you get used to that power level will depend on the upgradeability of the system!