I used and loved a SOG Flash II for over 10 years. Then last year it disappeared. I've been trying ever since to find an adequate replacement. That's how I got interested in knives.
The Flash II had been discontinued, so I got its successor, a Flash AT--terrible. The Flash II opened and closed very smoothly. People who saw it often asked, aren't switchblades illegal? The Flash AT was very stiff. I got a blister on my thumb. I complained and was told it needed breaking in. My original Flash II never needed breaking in. Anyhow, using two hands, I opened the Flash AT almost all the way, and closed it almost all the way, and repeated 1,000 times. No improvement. I sent it back for replacement. The next Flash AT was even worse. And the D2 blade rusted within a week. My original Flash II never rusted.
Eventually I found a Flash II for sale, new. It was almost as bad as the first Flash AT. Found another Flash II. Just the same, and not returnable. At least it did not rust. Half a dozen different lubricants did not help. I've given up on SOGs.
A few dozen knives later, the closest I have come to the original Flash II is a Benchmade Volli with CPM-S30V, which is also assisted and almost as smooth, but a lot more expensive. Benchmade AXIS locks are similar to the ARC locks on older SOGs. I got a second Volli in case the first one ever disappears. But there are several manual knives I like about as well as the Vollis. Benchmade Griptillians and Bugouts can be very nice, and a lot of brick-and-mortar stores carry them. But the new "super premium" Bugouts in the local stores now suck--stiff, dull, and one I saw today was badly centered.
Spydercos are an acquired taste, but once you get used to flicking them open with a thumb or finger in the Spydie hole, they are way cool. I have two Spyderco Para 3s, one with CPM-S45V and one with CPM-S110V, that are great. But cheaper Spydercos (under $145) are not nearly as good. And three out of the last four Spydercos I've bought have been bad--there was a Native Chief that was so stiff it took two hands to open, a Lil Native (over $200) where the blade always bounces off my fingernail when I try to close it, and an ARK neck knife that was ridiculously dull out of the box.
For under $75, there are some assisted Gerbers that open and close pretty well, but they have cheap steel. You might be happy with them if you enjoy sharpening knives.