I think the 0450 is ZTs best offering currently available, if you like slim light knives it is the way to go. I have moved away from modern folders to traditionals but still edc my zt0450cf every day To give you some clue of how much I love mine. There are only 2 negatives I can come up with:
1. It is S35vn, not a huge negative, it’s a respectable steel that will serve you well. S35vn (and S30v) are just not my favorite steels. But it beats the north forks S30v imo.
2. It will ruin you for other flippers, It is the best flipper I have ever owned. Not exactly a negative...
One other thing to consider, is with the ZT you won’t be playing QC roulette and praying you get a good one.