Aluminum 29er disc rim suggestions.

[Themountaintop]

As the heading suggest I'm looking into semi aerodynamic Aluminum 29er disc rims. I haven't been able to a road bike for many years due to spinal issue that make it impossible to maintain position. I desperately want to ride a bike again and think there's a tiny chance the far more upright position of a mountain bike could work. The rims I currently have are old (Roughly 15 years old) narrow, squared off and heavy. Would like to find some wider, lighter and more oval shaped rims. I've been looking at some offerings from DT Swiss, Stan's and Hunt. I have a nice set of hubs so rims are all I need. Are there any other brands that I should be looking at?