My main PC is a little over three years old. It has an i5 4690k, R9 480x, and 8GB RAM. The PC itself cost around 1000USD to build. Peripherals were another 500USD or so, but I upgraded those over time. At this point things are pretty nice and I don't expect to replace anything for at least two more years. I don't need cutting-edge.
I also salvaged/resurrected my previous PC. I keep it around for playing with BSD or other experiments, but I don't really use it that much. If I don't turn it into a server I'll probably give it away.
Then there's a laptop which I mostly have for when I visit home or need to do on-call work. It's nothing special.>>763
I had my desktop in uni. It was two years old when I started and was limping along by the time I graduated, but I loved the thing. I did have a single dorm so space wasn't as much an issue, but I also knew some people who managed to fit their multi-monitor setups in their double dorms and still be reasonably comfortable. Typical dorms will have a desk for each resident, so unless you plan on filling yours with other stuff you should have some amount of space.
The portability was an issue mostly because I didn't have much reason to go out. The computer labs proved to be a great resource for socializing and collaboration but I missed out the first year. By senior year I think I was doing more work in the lab than my room, even when working alone. Of course a laptop also helps for versatility when doing groupwork because sometimes the lab is inconvenient (crowded, noisy, hard to find adjacent PCs, etc). And while I can fondly remember lugging the desktop across campus for LANs it was not pleasant at the time.
Overall I would recommend bringing it unless you also happen to have a laptop that is powerful enough for any work and entertainment needs, or if you know that your room will be tiny and not provide a regular-size desk. Have you seen a sample dorm room yet?