@RacerX330 - If all runs will be under 55m (~180 feet), I would recommend Cat6 over Cat6a: cheaper, lighter, thinner, easier to terminate and almost as PoE-efficient, for all but the most high-power requirements. Also, regarding shielding/grounding, unless you know 100% that one or more components will
require grounding (highly doubtful) or you have unavoidable in-wall EMI, I would skip shielded cabling. Proper shielding requires measurable extra work to terminate, plus grounding
every single item connected to the cable fabric. Not a trivial task, and I would argue largely unnecessary in most cases, provided proper-quality UTP is used. On that note, I'd only use domestically manufactured, commercial-grade, tested and verified cable -- example USA brands would be Belden, Berk-Tek, General, Mohawk, Panduit, Superior Essex, Vertical Cable etc. -- the kind you'll find at electrical suppliers, online wholesalers like
FalconTech. IMHO, the minimal extra cost over the Chinese whitelabel stuff like Monoprice is worth it.
If you do have runs that are over 55m/180ft, I would look at Cat6a
UTP of the proper quality. The "Cadillac" choice would be
Belden 10GXS, which approaches Cat6 slimness, is fully PoE-compliant out to 100m and provides STP/FTP-level EMI resistance
without the need to ground. That said, the price is in the stratosphere (~$1500 per 1000 feet), so probably not conducive for a home project. If you can get away with Cat6, all the better.
For your copper termination accessories, you could probably get away with anything generic (I prefer it to be at least UL-listed) but again if you want to stick to top-tier all the way, look for commercial brands like Leviton, Panduit and the like.
Another tip: a quality electrician does not always equate to a quality data cabling tech. Make sure you vet this person's/company's abilities and/or certifications. If they check out, great. Otherwise, I'd bring in a high-end AV/IT firm to handling the data work. You won't regret it. They'll also be apt to recommend (and exclusively use) commercial-grade cable and components.
Lastly, if you're going through all the trouble to run ethernet throughout, I would skip consumer-grade mesh (and consumer-grade products) entirely and run SMB-grade, discrete components (wired router, PoE switch and controller-based APs). Wireless access will be cleaner, more reliable and the network will run more like an appliance and less like a toy -- for you that means few, preferably zero, random help calls from mom regarding the network not working. For more details as to why this is, I'm happy to expand, but something like a full Cisco small-business stack -- RV340 router ($190), SG110-16HP switch ($150) and CBW140AC APs (~$150 ea., ~$400 for a 3-pack) -- wouldn't be too much more costly than a high-end consumer mesh product, but would likely be way more reliable.
Hope that helps.