Sublime Text 2 shortcut line substitution - keyboard-shortcuts

Question

Excuse me for the non-informative title. Just can't shortly describe what I want within one question.
Okay, let's say we have two lines in our text file. The cursor is somewhere in the 1st line (the example shows cursor position):
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What I want is to substitute the first line with an empty line or with another line and cursor should be at the start of this empty line.
I tried CTRL +L and type the "new line". But CTRL +L expands selection to the line + \n and that causes this result (the example shows cursor position):
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If the cursor is at the begining of the line, CTRL +K+K works perfect. But how can do the same when the cursor is not at the begining (without pressing ENTER , arrows and using mouse)?

Answer 1

The equivalent of Ctrl + K + K at the beginning of a line when the cursor is somewhere in the line is : Ctrl + Shift + K
Here:
first line with text
second line| with other text
third line with another text
-> Ctrl + Shift + K :
first line with text
|third line with another text
EDIT
Since it is requested that the result should be:
first line
|
third line
You could either do what is written above and press ENTER or go to Packages/Delete Line.sublime-macro and replace the file with the following code:
[
{"command": "expand_selection", "args": {"to": "line"}},
{"command": "add_to_kill_ring", "args": {"forward": true}},
{"command": "left_delete"},
{"command": "insert", "args": {"characters": "\n"}},
{"command": "move", "args": {"by": "lines", "forward": false}}
]