Looks like Sublime Text 2 meets his requirements. Goto Line is simply Ctrl-G, and up pops a simple input line, similar to hitting ":" in vim. As an added bonu

Looks like Sublime Text 2 meets his requirements. Goto Line is simply Ctrl-G, and up pops a simple input line, similar to hitting ":" in vim. As an added bonus, the input line disappears if you press Ctrl-G again, hit <esc>, or press enter without entering anything. So, fast and easy to get into, fast and easy to get out of.