Wow, you got them going early. Mine have only just gone in the ground. My office windowledge looked exactly like that last year until I eventually brought them home for the conservatory.
I've gone for Jalapenos for pizza topping, Pinnocchios Nose for general chilli use and Pusa Jwala for fresh green chillies. I grew Dorset Nagas last year which worked really well but weren't really practical. I could just about handle the heat but the taste just overpowered everything, they were really gross!
Where about in the country are you growing these? I'm surprised they are growing so well. Makes me wish I got mine in earlier.