The 8GB of RAM seem a little low since you want as much short-term memory with the Sims as you can get. The way someone explained it to me is that RAM is 'volatile' memory or in laymen's terms, it maintains data/information ONLY while it is receiving power, but it is this information which drives your programs.
The 3.6GHz (processor speed) and 512 SSD are sweet for the price. The faster a processor is, technically, the faster your system will be because it is what takes information from the RAM and 'processes' it. The faster it does this, of course, the better. Even if you have TONS of RAM, if your processor is slow, you won't really have a fast system. Again, conversely, RAM is what our systems use to ACCESS something...