Good for you for starting racing. You're going to have so much fun. My 2 cents:
1) You're probably racing USCSA, wherein the spectrum of competitors and equipment is broad, and a cheater race ski is perfectly adequate. Don't get a FIS ski. Any FIS legal ski is way less fun to freeski than its cheater counterpart; if you don't believe me, borrow somebody's for a few runs and feel how demanding they are. And the cheater version will make a peerless ice freeski, thereby extending the reach of your (presumably limited) college budget. Also, mere mortals like you and I are generally unqualified to operate FIS skis near the fun edge of their performance envelope (and even if this is untrue, it's hard to find enough hill to really let them rip out here in the East). I cannot emphasize enough how terrifyingly powerful a FIS ski feels when you have come from a background of gentle, friendly consumer skis. Like being strapped to a F-18 jet that you can't turn unless the afterburners are on. And the brakes have been disabled.
2) Brands: Almost all race stock skis have a high design/build quality, but performance characteristics and "feel" vary by brand and model. For example, Volkl Racetigers feel (to me) damp, smooth, and predictable, while Atomic Redsters like to hook up early. You might want to try a range of brands (perhaps including some not sold by your shop), and maybe keep a notebook of your impressions so as to narrow down what you do and don't like. I will put in a good word for Nordica Dobermann SLR's and GSR's as a playful, springy line of skis with brutal, unbreakable edge hold on sheer blue ice. I have literally no experience with Rossi or Blizzard and it's been years since I've seen a Salomon race ski.
3) Ski size: SL skis come in a very small range of sizes, so for a given manufacturer, there will probably only be one plausible choice for your height. Which is shorter than you're used to, probably 160-something. GS skis tend to ski long compared to today's civilian carving skis, so if you're looking at GS skis, you might want to try the same planks in both a longer and shorter size to get a feel for them. As a new racer, it's pretty easy to end up with too much ski underfoot and feel overwhelmed.
4) Boots matter a lot in racing. A lot. If you haven't spent time with a bootfitter you should do that before worrying about planks.