you don't have to get the MSD 8969. If you want something flashy under the hood, yeah go for it. However, all you really need is what's called a "window switch". Same switch that is used for turning nitrous off/on at an RPM range.
As a matter of fact I would get a $40 switch from Summit and use the rest for a Nistune ECU.
Basic install should be:
SR20VE $750-$850
Window Switch $40-$200 (Greddy MSS is going up because you can't find em)
2.5" VRS Exhaust $320
2.5" Catalyst - $70-$150
Tuned ECU - $250-$600 (depends on used/new and man)
Intake - $40-$350 (depends on used/new and man)
And what most seem to be missing from there quotes, a Tune from a local tuning shop.