Text Scaling Help

[theanjo]

I want to make the fonts for the messages, user, or whatever, bigger. However, when I try to do this with the Text Scalar, the font doesn't look quite right and seems uneven. (very noticeable when compare two of the same letters or numbers next to each other)

Are there any tips on scaling the font?
Can someone tell me what the unscaled font's aspect ratio (or whatever it's called) is so I can try to make it bigger?
Is there a neat width and height number you use?

EDIT: If it helps, the aspect ratio of my screen is 16:10

[TERRORsphere]

I usually stick to 640x480

[theanjo]

UPDATE ON 1ST MESSAGE