1 This is the usual positioning of an adverb with would like. Use it 99% of the time.
2. People would understand you but it sounds odd.
3. Yes, you could use it to add emphasis but it would be a rare useage. I can only imagine it if someone rather pompous had been giving you a list of other things and needed to emphasise 'and as well as those things, it's also very important that I have....'. Yes, pompous is the word for it.