Question: What's the best TCXO on the market at 40 MHz?

Hi,

I'm selecting a TCXO for my low power radios.

Specs:
Frequency: 40 MHz or 38.4 MHz
Voltage: 2.8 or 3.3 Volt
Ouput: Clipped sine wave
Tolerance: +/- 1 ppm
Enable pin: optional
Package: SMD


Any ideas?

Thanks,
Enrico Migliore