Replace Regulator or Motor??

So ive done a little research on it, i think im experiencing a worn out motor for my drivers side front window. Whenever i roll up my window up it rolls significantly slower then my back windows, and for the duration of a automatic roll, it continues to get slower until it comes to a complete stop, anywhere from half way up to maybe an inch or two from the top. im looking for a second opinion on this and any insight would be helpful.