Is this sentence correct?

[netgeek]

What I want to say is I need some time to make my final decision and I would inform you as soon as possible.

This is what I wrote.

As this is an very important decision, I would like to take sometime to make my final decision and will inform you at the earliest (or as soon as possible)/at my earliest

[billmcd]

What I want to say is I need some time to make my final decision and I would inform you as soon as possible.

This is what I wrote.

As this is an very important decision (I would rather use "question"/"issue" or similar term rather than repeat the word "decision"), I would like to take sometime to make my final decision and will inform you at the earliest (OK) (or "as soon as possible"OK) /at my earliest (No.)

b.

[5jj]

However you word it, 'some' and 'time' are two distinct words, separated by a gap/space.

[netgeek]

Thanks for both of you ! but can you explain why I cannot use My Earliest ?

[billmcd]

Thanks for both of you ! but can you explain why I cannot use My Earliest ?

It is understandable, but using "my" in the phrase, it also has a sense of "I'm too busy to address the question/issue right now and I'll get to it when I have time".

[netgeek]

Ok .I got it!
Thanks