First you need to decide if you'll be happy with your SN95 once you get it handling/performing like you want. If you want a Fox or II, no amount of improvement in your SN95 will satisfy what you really want.
That said, here's my suggestions:
3.73s: Do it. No excuses.
Lowering: I swapped my springs last year for my
Eibach Pro kit springs. Improved handling, but was still kinda sloppy. I did install my MM CC kit at that time. Just finished installing my
Eibach Pro Damper springs and struts. Much better steering feel; the nose is a lot more "planted" where I put it, not wallering around as before. I say go with a kit, because it makes sense to get stuff that was designed by engineers to work together. That's my $.02, which will get flamed mercilessly, but I submit it for your consideration.
Subframes: I also just finished installing my MM full length subframes. VERY worthwhile investment. You won't realize how flexible your car is until you put them on.
Rear LCAs: Just finished installing these also: MM lower LCAs with the urethane bushings for the front. Rear end is much more "planted," both at launch (no more wheel hop) and in the twisties and bumps.
I can't tell you exactly which of my new installs made the biggest difference, but I can say that I'm very happy with the change in performance of my car. Spring in Alaska means frost heaves--very uneven road surfaces that would probably shock most of you if you've never been here. Last night I took the car out for it's inaugural test drive, down a two-lane road with no shoulders that gets torn up bad with the bumps (I forgot how bad). This is my normal testing ground. Last year when I went through some of the really bad sections, I was definitely on the outer edges of control. Car bounced, bottomed, and generally left me with a few white knuckle moments.
Same run last night, but with much worse heaves--no bottoming, no bouncing, even over those "oh *****" bumps, and it went where I wanted it to go, no matter what kind of pavement I was dealing with.
Plan your setup carefully, look for setups that are designed together (ie,
Eibach springs and dampers), and you can have a great handling/running car, but no matter how many upgrades you make, you'll never have a II or a Fox.