I don't know about wine parings, but I can tell you from our visit last year the food is all the same price: $125/person (before tax & tip). With that you get choices from about five different courses IIRC.
Don't know about CM discounts, but if you have an AP or are a FL resident, I highly recommend the Tables In Wonderland membership. You get 20% off, so if you are planning to go to V&A at all, then that knocks the price of a TIW membership down $50 right off the bat. Regular memberships are $95; $75 for AP holders.
The biggest PITA about V&A is the dress code. You really have to plan your visit here, because who packs a dinner jacket for a trip to WDW? I packed a suit and schlubbed it all the way to FL just for that one dinner. But I have to say, it makes the experience much nicer... it's the only restaurant I've ever been to in FL that wasn't full of sweaty tourists in shorts! lol