looking to travel to Vietnam in June next year for two people for one week. Where's the best place to stay. Ho Chi Minh?
Depends what you want, really.
Saigon is a good bet for an introduction to the country; a reasonable number of people speak English (compared to elsewhere in Vietnam) and it has a lot of the more modern (ie Vietnam war) history and places like Ben Tanh market. You can also do the Cu Chi Tunnels from Saigon if that's your thing.
Hanoi is much more "Vietnam" IMO and the missus and I preferred it. Staying in the old quarter gives you a look into a much more real version of the place I reckon, and Hanoi as a city I definitely found more interesting to explore.
Plus, as mentioned above, Hanoi offers access to Halong Bay which is a must IMO. We stayed on a boat called the Halong Ginger for a night out on the bay, absolutely spectacular and seemed a hell of a lot better than a lot of the day trips.
You can also stay in various towns along the coast that are awesome, beach-vibe places. Hue, Da Nang, Na Trang and Phu Quoc (an island near Cambodia) are all popular and offer their own advantages.
TLDR-Saigon is more modern, Hanoi is probably more "authentic"