You'd probably like the string I put in more racquets than anything else - plain old Prince Synthetic Gut with Duraflex. It's not too soft, not too stiff, has average durability, holds it's tension well, and is inexpensive. It's not great at anything, but pretty good at everything.
I'd be interested in what Wilson string you have right now. If it's an expensive Wilson string, then it's probably NXT or Sensation - the problem is, those are actually softer than your Head strings, which you think may be too soft.

That makes me think it may be tension you like with the Wilson strings.
One thing I like to do when trying to narrow down what someone likes, is to change one thing at a time. So, here's my official recommendation: Get the exact same string you got last time (the Head hybrid), but get it strung about 5 pounds tighter. The worst thing that will happen is that it's too stiff, but it will loosen up, and you'll get a lot of information about what it is you like or don't like.