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#11
The size depends on you. We can't answer that. I would get one large enough to hold your OS and primary apps. The sweet spot right now is in the 128 GB range. That would be fine for most people, however, I went for a 240 GB just so I could have plenty of room to grow. Crucial, Intel, Samsung, OCZ, all make quality drives. Just stick to a reputable brand.
I'm stating it one more time, since it hasn't been answered. Are you sure you need the extra memory? If you aren't fully using the 6 GB you have now, that extra memory will yield only one result....less money in your pocket. Just adding more memory to a system doesn't mean anything will change. 6 GB is quite a bit, so as mentioned several times above...you most likely could have saved that money and put it towards the SSD.