Hi George,
Do you really think I'd be asking about this specific board if I was a beginner? There's a reason I'm asking and there's a reason I'm interested in a board with 4 10G SFP's. Because it is not beginner friendly or doesn't suit your personal fancies that doesn't exclude us talking about more advanced topics on this forum, does it ?
-Vince
If you are not a beginner, why are you asking those questions? You should know answers then. If you don't like the answers - well, tough life.
If you buy an eval board, it typically ships with some sort of voucher for a device-limited version of their IDE. The catch here is Altera provides time-limited license, while Xilinx provide a version-limited license. The latter is obviously better because you can use that version ad infinum, for example I own a Genesys 2 board with K325T device which I bought like 3 years ago, and I still can make new designs for it, using whatever latest version of Vivado was at the time I redeemed my voucher.
But that also means that whenever you a buy such a board second-hand, you aren't going to have such a voucher, so unless you acquire the license some other way, that board is as good as an e-waste for you because you aren't going to be able to use it. Even here things are easier with Xilinx because you can only buy it once, and you will be able to use that version forever, while Altera's license is a time-bomb which will require constant upgades to maintain it's functionality.
The cheapest dev board with 10G MGTs that I know of is Digilent's Genesys 2 board, it is now $1099 (was $999 when I bought it), and it includes abovementioned voucher. It doesn't come with SFP+ cages, but there are FMC daughterboards which have them, or you can make one yourself if you so desire.