If it's speed, go CV 35/1.2, but it's big and it costs more. If you want speed and size, CV 40/1.4, great lens, medium price. If you want size and speed is not an issue, CV 35/2.5 PII, a bit less expensive than the 40.
I'd go with the 40, the extra speed is very handy and it's a well built lens.
B2 (;->