Take this statement as neutral because I personally have no experience in the matter. I have heard from friends that they have issues with OCZ SSD's. I know that Corsair makes a solid product and OCZ may as well, but I have heard bad things about them.
any reason to choose a4 vs Intel Celeron g530/540/... ?
If you plan on doing no gaming as you stated, the celeron is the better choice, The celeron cores are a little bit faster than the A4, and plus the celeron is $10 cheaper than the A4 on newegg. To me their is no point in spending $10 more for better graphics performance when it's not going to be used for gaming.