Also, is an SSD transferable/reusable?
They are, so you can buy that now and bring it with you to the new future build. It's a fantastic upgrade but you do need to know your stuff a bit more, try to google some guides on SSD's, to keep em in optimal shape. They degrade in performance when they get filled to the max or if you have lots of rewrites on em. But the performance difference will blow you away.
Couple of things though, SSD's work with firmware, and it's very advicable to update to the latest firmware as a first move as soon as you get it out of the box, before you start installing things on it. The linked Samsung EVO for example had a massive bug fixed this way just last month.
In my book Samsung and Crucial are the best brands in SSD land. There is a slightly older M500 on amazon available for only 80 bucks
http://www.amazon.com/Crucial-2-5-I...qid=1417719145&sr=8-2&keywords=mx+500+crucial
It performs a bit less then the samsung, but you still get 90% of the performance at half the price.
You will need knowledge of installing windows n such, because you can only really enjoy an ssd with a fresh install. I also suggest that you don't use an older windows then windows 7, this is oldest windows that has proper support for SSD's.
A real money saver upgrade can also be a new PSU, especially if your current PSU is not 80% efficiency certified. You can see on the sticker on the PSU what it's efficiency is, you will need a new PSU anyways if you want to build a more powerful gaming system in the future.
http://www.hardwaresecrets.com/article/Understanding-the-80-Plus-Certification/742
Good luck, and if you decide to replace PSU be very very sure you read up first on savety measures.