They'd be lovely. I've run 28mm tyres on 25mm internal rims and they come up in a great profile. I'd imagine your Schwalbe tyres would come up around 32-33 on these rims.
My main road wheels are also 25mm internal, I'm a firm convert to the wider is better trend.
Could I use Schwalbe G-one tubeless 30mm tyres on these wheels or would they be too narrow for the rims?