40m DC-receiver – What’s next?

Now that the basic receiver is working, what do I want to add to consider the receiver ‘complete’ ? This is the current set-up :

The following things I would like to add:

• S-meter : shows the strength of the received signal. Based on AF signal
• CW filter : Multiple Feedback Band-Pass filter, 1 or 2 stages, centered around 750Hz
• Audio Amp – current the bench utility amp is used with a gain of 20 dB.
• Keypad – Add 3×4 Keypad much like the K-225 keypad as found in Lowe HF-255 receivers