Welcome
ErocSD
.
That is a fantastic start to your collection!
There has already been a lot of great advice posted for you so far. I will throw in my choice.
I have also owned knives from gas stations, flea markets, budget knives, mid techs(whatever the heck those actually are), semi-custom and full customs. The best knife you own, is the one you like and the one that cuts. I have been through hundreds of knives in my lifetime, and i agree, right now $500 is when you really see a change in tolerances.
As a user of the sebenza, you really cant go wrong. You can start with a PJ and use the heck out of it to see if you like them. Then when you realize, dang, the sebenza is awesome, there are so so many beautiful choices in the Sebenza.
Word of advice, stick to what you are comfortable spending. For a long while i had a few "expensive" beautiful knives in the safe, now i carry a highend Shamwari everyday, and i use it!!! I enjoy it more than when it sat in the safe.
Again, welcome...enjoy the ride, and keep 'em sharp!!