How Foul is your Weather?
If you are expecting to sail in storms, rough water, cold nights, or in the off season, I'd buy as high quality gear that you can afford. This gear is going to last a long time (I have twenty year old 3rd Reef from West Marine), so don't cheap out now, you may wind up buying something more appropriate in a few years. Foul weather gear is constructed differently than rain gear with more room where you need it, reinforcements, etc. Remember, as owner/skipper, you'll be the only one cold, wet, and miserable on deck, while the rest of your crew is safely in the cabin. And while I'm spending your money, may I recommend something breathable like Gore-tex? Sweating under your foulies makes you cold, wet and clammy later on. Does your local West Marine have a "back room" where they sell off all of last years models? (Or better yet, an end of season parking lot sale?)