The CA carbon is really stiff and light, which is about as good as you're probably going to get for a fast climbing bent. My Al TW-Bents is a tank by comparison. After letting a co-worker test drive mine, he went and bought a Carbon Aeron 2.0 and it was a slick bike.

Keep in mind, climbing on a recumbent is different (significantly so). Not necessarily better or worse, but the physiological work it very different.

I really like my velomobile, even though it's much heavier, because it doesn't really matter how slow I go, I don't have to worry about balancing.