I mean reasonably cheap decks, like not rare ones because I've been doing flourishing for two weeks and I'm not that good. So I would be horrified if I dropped a wynn, so not rare decks please
Here's a question for you; Are you wanting to show off as you do card tricks or are you wanting to do fan work to show off both, art & dexterity?
When doing traditional stage & parlor work and specifically Card Manipulations, there are special decks that are ultra-thin, like the Norm Nealson decks (roughly half the thickness of a normal playing card) there are likewise colored & patterned "Fanning Decks" which seem to be a rare breed now days. These decks allow you to create multiple color changes and literally build geometric patterns and more. I'll bet some of the older Brick & Mortar shops like Abbotts & Stevens still carry these.
As much as I admire the artwork all these new decks offer, I've seen little in way of true "innovation" when it comes to ways of working with the cards in creating a present-day version of these yesteryear phenoms. It's quite disappointing to tell you the truth.