The V5 Vamo can go up to 15 watts or 6 volts depending on what resistance atomizer you are going to use. I think there is at least one company out there that is selling a 20 watt Vamo labelled as a V5 although most companies call it a V6.
You can get a pretty warm vape from that, again depending on what you are going to put on top of it.
A Vamo is just a power source, most of the performance will come from what you pair it with.
In my opinion you can get a warm satisfying vape from a Vamo. I use to drip an Igo L with mine with a single microcoil at around 1.4ohms and 10-12 watts and be very happy (when I mainly did mouth to lung)
It's a good starter APV, but depending on the price you are going to pay, there are other devices out there now that can provide 30 watts or even more for a similar price.
Do you already have a
tank or clearomizer that you are going to use with it? What are you currently using that makes you prefer a warm vape?