You have to understand the tradeoffs. Carbon will be lighter, but more expensive and feature worse braking performance than alu. No matter what calipers or pads you choose. I have 3 sets of carbon rims, and I do worry about heat buildup on long descents.
High profile wheels are more aero, but will be heavier. Since much of my riding is accerations/starts/stops, I like the lower mass of low-profile rims.
Clinchers will be about 150g heavier per wheel than tubulars - this is inescapable due to the construction of clincher rims. For this and safety reasons, all competitive road and cross riding at the elite/pro performance level is done on tubulars.