Don't get stuck on Quantum or even on pairing
brand-x rod with brand-x reel (all brands are compatible). There is so much advertising, sponsorships, endorsements, eye candy, etc. in fishing rods and reels it can be confusing for anyone, not to mention someone relatively new to fishing. Maybe before spending $300 just wait a little, browse some forums (like this one), look for sales... it won't hurt.
I think the St. Croix spinning reels are made by Daiwa. Probably better choices.