Longjon -- Your soft dimensions are what really matter when it comes to finding comfortable underwear. If you are 10x7 hard, then I don't think any underwear will really keep your fully contained when erect. And if you are 10x7 soft ... well, first, my condolences ;), and second, none of these types that you've linked to will work for you.
Either way, don't even think about anything in a low-rise style. For decent coverage and "support," look for a boxer brief with a very large and well-defined pouch. You might try
these ... I have a few pairs and they are decent for the bigger, ballsier guy. Merona briefs from Target are also OK -- very stretchy and and very inexpensive (although not ideal if you are built like me, big in front
and in back).
Good luck! Believe me ... I know how it feels to be on a full-fledged quest to find decent undies!
Steve :)