Welcome to the club! Oh, and if you get a 97 2.5RS, you will have a very rare car, since they didn't come out until the 98 model year

As for turbo's and kits, there are several options. I'm in the process of building a kit from a WRX turbo, Saab 900 intercooler, Eclipse blowoff valve, and then subachad's tubing. Going to be cheaper than buying a pre-made kit, but then again, most of the parts are going to be used (I love eBay!). Now, as for kits, there are the Forced Air Technologies kits:
http://www.forcedairtech.com/ , the LUDESpeed kits:
http://ludespeed.com/products/subaru/impreza.html , and then Templer on this ver board is getting very close to releasing his superchargr kit for the 2.5. So there are plenty of options for that, that's for sure! As for safety, if you are staying on stock internals, I think 5-6 psi is fairly safe. Biggest concern is the transmission, as in the manual tends to gernade after about 250hp (if you don't drive carefully), while the automatic can easily handle up to 350hp. As for suspension bits, there are lots of different setups for different applications. A bigger rear swaybar, solid endlinks, and strut tower bars are all good, and work with all the other setups. By the way, nice choice for a first car, just be carefull with it, we don't need you hopping it all up and doing stupid stuff on the streets. Sure, it's kind of fun, but just keep it on the track, that won't get you in trouble or endanger other people. Anyways, hope all this helps, and if you have other questions, don't forget to search, there's already tons of info here, and anything you don't find will show up if you ask a question. Have fun, and drive safe!