This ASUS VN247H is what I've been using for the past 2 years. No problems at all and I use them for console gaming and my PC monitor.

1ms latency and it was $300 when I bought it. Now it's $170.

Good SSDs: Cheap (but good): BX100

Quality: MX200 I personally use the MX200, and no issues.

I'm also a student on a budget, and I used this ASUS monitor as it has built in sound, great colors and is large enough to enjoy. Though it is a bit more than your budget, this is the cheapest I could find with built in sound and great view (with stellar reviews, ensuring its quality). If you want to go cheaper though, I would recommend Dell screens as they have discounts going on, look at their website.

Also yes, upgrade to Win10. I'm running it right now and have no issues.