Apologies but the question could have been worded better. I am certain many of our colleagues could agree with that(!)
Regarding the answer, 1500ft above airfield elevation (rounded up of course).
You state you wish to prevent a problem arising in the future. However, nothing is ever safe and preventative in this matter.
Let's say you have preset 5000ft MCP ALT.
ATC instructs go around, runway hdg and 3000ft.
In the quick and busy reality of a go around in IMC, you forget to set 3000ft and keep the 5000ft instead.
Guess who's busting an altitude clearance?
Did your procedure save you?