Cat6a

Pros

• I know the general advice is to buy cat. 6a for at home use, every site and forum says that it's the best for that.
• Cat 6 or Cat 6A is more likely to actually be reliable.
• Also agree that Cat6A will meet his needs for a very long time, maybe forever.
• Barring that, Cat6A will hold its own for years to come, single mode fiber will still be relevant at high speeds for the foreseeable future and is not terribly expensive.
• CAT6a will provide more than enough. More affordable and if additional legs are needed they can pull another CAT6a.

Cons

• 6a is harder to work with and more expensive than Cat 6 and usually necessary unless OP wants to run 10G over more than 55m or has extreme interference.
• I have 4 runs of CAT6A (23AWG with solid conductors) and they're hard as heck to work with, mainly due to how thick they are and requiring special RJ45 connectors.
• Cat6a is good for 500mhz over 100 metres
• Finally, CAT6A is harder to work with. It has a larger bend radius. This may or may not be an issue at the top-middle of your picture that shows a 90° bend. CAT6 is more than adequate at handling 2.5 Gbps.
• Cat 6a is a pain in the arse around corners, and isn't going to perform any better in your environment.