Here are my two cents after upgrading to W10. Must say, that I have somehow mixed feelings about it.
1) Privacy - during the upgrade/clean install don't click next, next, next....in one phase you will hit a page with something like this....help us improve our system by sending us information blah blah and similar settings like this. Also after installation go to the Settings and watch for the Privacy tab and go through it carefully - using your camera, microphone, unique ID for targeted advertisement and many more. If you intend to use Cortana, there should be problem too. She needs to get to know u, so she will log your Calendar, Contacts, Email (apps) and the info will be send to MS.
2) Edge - simple and fast maybe - but logging browsing history, favorites, etc.
3) Windows Update - you are forced to use automatic download and install, nothing else. I prefer to be notified.
4) Saving settings into Cloud and One Drive - better stick to local account instead of MS account and not using the mentioned services.
You can call me paranoid.
Needs to be said that u can switch off many of the spying settings, but I fear for the future
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DustKart:
Have u tried the W8.1 drivers - maybe a compatibility mode? I have Xonar D1 but I've only upgraded.