theory11 — Magic Tricks & the World's Finest Playing Cards

Cards

The Virts are great for cardistry, but are a little pricey; depends what your price range is.

But other than that, T11 also has amazing designed cards too! Personal favorite are the Monarchs
 
Bicycle is always the way to go imo for cheap cards

They look nice, they're super cheap (if you're in the U.S. Costco sells 12 for $20, but a regular 2 pack is just $5. They're cheap), they hold up well, and you won't be terrified of damaging them.
 
For cardistry, it is 100% virtuosos. They're really cheap for what you're getting. You can find them on eBay for under $20 and they'll last you over 2 years. I've had a virtuoso deck for nearing 3 years now and they feel brand new! I suggest the FW17s because they have a preferred stock but if you like thicker cards, try to find the SS16s.