Alphabooks - and I chose Cat Chant (whose real name is Eric) and Chrestomanci (whose actual name is Christopher Chant), from Charmed Life by Diana Wynne Jones.
Chrestomanci is quite dapper, and I had quite a crush on him as a kid, and to be honest, still do. He's just so dreamy. This is also quite a bit what I imagine Mr. Darcy to look like. Probably my Pride and Prejudice obsession all stems from reading Charmed Life.