I bought myself a deck some years ago. It's the Witches Tarot, with the Devil replaced by the Horned One. A couple of others have been changed, too, but for the life of me, I can't remember which ones. It's served me well over the years :)
All together I just own one deck, though I might consider a second one if the right one comes along.
I have about fifteen decks altogether, but only use the Wildwood Tarot backed up with the Druid Plant Oracle (ok, not really a tarot deck but I find they work well together). The other cards I collect just because I enjoy the artwork.
Honestly, the reason I brought up this topic is because I only have one tart deck and I've been using it for years but I find myself ashamed of it's theme now, especially since some people now ask me what deck I'm using when I do readings. Like I still love the colours and artwork of it but I feel like if people knew what type of deck I used they wouldn't take me seriously anymore... And now I've found two new decks that I really like and I can't choose which one I want out of the two of them! They both have pros and cons but the cons aren't enough to make me not want them. What do I do?!?!?
Personally, I'd suggest using the deck you've been using for a while, as you've built up a connection to them. Doesn't matter what anyone else thinks about your choice, you have a rapport with them.
If you are really unhappy with using those cards for professional readings, and have to make a choice between two others for replacements, you could ask your current deck which new set you should get. Or use a pendulum if you want a clearer 'yes/no' answer.
I've gone back and forth with the two new decks and have since decided which one I want after hearing people say that the makers are using cheap materials and their cards are falling apart... Especially when the full deck (78 cards) is $50+ without tax and shipping. AND ontop of that they screwed up the numbering on Justice and are not willing to reprint the cards with the correct number.... Just kinda slowly pilled up into a big thing of Nope! And I have heard nothing but good reviews for the other deck plus they're cheaper... So all in all IF I get another deck it will be one and not the other... But thanks for adding in your two cents.