Corsair Nova 2 30GB 2.5" SATAII: meh.
Crucial V4 32GB 2.5" SATA II: No. I'm not sure if they ever did get all the firmware issues sorted out. This was a dud drive from Crucial.
Intel 320 SSD 40GB: only if it's free.
ADATA Premier Pro SP600 32 GB: Much less room than you think it will be, as any given OS install ages. Linux is not any more immune to that problem than Windows is, despite the urban myth that it is so.
What about a 64GB Sandisk Ultra Plus ($55), or 128GB MX100 ($75)?
I haven't done any "surveys," but after building my flagship desktop (3 freakin' years ago -- the one in my sig), and after acquiring this six-to-seven-year-old laptop (Gateway E-475M) a week ago, I've come to conclude that for many "mainstreamers," dated technology is not so "dated."
The "bottom-line" issue would be "How much should I spend to upgrade the dated technology?" It may depend on your enthusiast-fanaticism. Obviously, you might think twice about spending $200 on a system when there's a budget $249 brand-new Acer or some-such current technology available. But it is also true that you can migrate new parts later when you decide to unload your used system.
It's ultimately about your "level of satisfaction" as well as how much you spend. But $75 on a 128GB MX100 is . . well . . . about seven Mexican dinners. It's likely sufficient storage for business stuff -- doc files, xls files -- even a small archive of scanned PDFs.
It's the OP's choice. But no sense in getting small capacity SATA-II SSDs of questionable reliability. Sometimes, you find old or outdated models can be twice their original MSRP, because a reseller is looking to snag people desperate to obtain only those parts, or they count on a sale to the galactically naïve.