If you don't have any significant security threats, I think any decent lock from a reputable company like Yale or Schlage should be fine. If you really need a high security lock, I like Medeco. For most people, actually using your locks (and alarms) counts for a lot more than the hardware itself. If you do upgrade to serious locks, you need to make sure your your door and strikeplate are of equal quality and look for other weak points.
Is there a specific reason you want to replace the locks? I can see why you don't want old keys to work, but unless the locks are really poor quality or from an unknown company, you will probably save money by just rekeying the existing locks. Personally, I'd call a couple of local (reputable and fully bonded) locksmiths and tell them exactly how any and what kind of locks I had and ask them for an estimate to rekey them. If my employer had an existing (positive) relationship with a locksmith, I'd consider that locksmith as well. If you choose from one of those estimates, you'll have an existing relationship with a local locksmith, which can be a handy thing to have in the future. A locksmith can also be a good source of information on what level of security you need. That said, rekeying a lock isn't rocket science, and you can probably do it yourself if you are reasonably handy.
Congrats on the new home!
I can't comment on wifi and smart locks. They seem like needless expense and complexity to me, but I have friends who love them, and I admit to being a bit of a Luddite.
