I thought of getting a number pad again, but I wouldn't use it 95%+ of the time. How often do you find yourself in need of the numpad? I've learned to use the numbers above the alpha keys quickly and accurately.
If you want a numpad just to have a complete set or look, then go for it. If you lube MX Browns, they will feel less scratchy. You might want to mod them to higher weighted springs to be closer to the weight of the Topre keyboard you plan to use it with.