If you live in the US and have a Costco near you, go there. You can get 12 decks for about 13 bucks. That's just a tiny bit more than a buck per deck. They are great for everything all around. They are great for magic and flourishing.
i for one, don't really like the feel of the wynn's but that's a personal preference i guess. im a big fan of Tally's and bikes. When i started flourishing i practised too much with old cards, and got too used to the "not so smooth" feel, so whenever i opened a new deck i could not handle the cards properly. took a while to rework that out. so just a little tip i guess.
I recommend Tallys' or Wynns'. Personally, I think that the Tallys' feel thinner than Bikes.
Keep in mind that the Ellusionist custom decks are air-flow finish, which means really soft edges. I'd rather order Wynns (which are very "tight") or Tallys' depending on what you're able to get. It's also about your personal style. I guess you'll have to order a couple of each and experience them for yourself.
It all depends on your style and what you like to do. Personally, I go through phases, using different cards for certain periods of time, getting tired of them, and trying new cards.
I have used and still do use everything from Bikes (vintage and rider back)and Tallys to Wynns, Aladdins, WPT, and many others.