>I don´t want the user to go out & back in the grid. the less the user uses mouse, the faster they write data.

That's a good point. I make sure my Add and Delete buttons have accelerator keys.

>And with a delete button outside the grid, the user needs to pay attention and make sure wich record´s active so they don´t accidentally delete the wrong record while a Delete button in each record is more clear.

True enough. If you can afford the real estate, what you say makes sense. However, I do use row highlighting to make sure the current record in the grid is obvious.