Hello mshilo,
in my experience, Vizsla are very soft and sensitive dogs. Sometimes a bit anxious, can be difficult to leave alone and can be scared of loud noises. But mostly very sweet with people, not territorial at all and without guarding instincts, so very unlikely to make problems with the neighbors or children. Also mostly very social with other dogs, have very little potential for dog/dog agression.
They are very energetic, need lots of exercise both mentally and physically, have a strong hunting instinct/prey drive. But so have RR and Basenji, they Vizsla might be the one out of the three breeds that is the easiest to train because RR and Basenji are both very independent dogs, whereas the Vizsla as a gundog is pretty well trainable if you generally know what you are doing.
Basenjis are rather quiet and clean dogs, so great for a smaller apartment (also easier to find a new apartment with a smaller dog if you need to move, landlords are always happier with smaller dogs), provided they have enough exercise. They are also very agile and energetic. They can be quarrelsome with other dogs, especially the males can be hot-headed.
They are usually reserved with strangers, not very territorial and guardy, but don't neccessarily like to be touched.
RR, in my experience, tend to be same-sex-agressive towards other dogs. The best of them are rock solid, stable characters, but many today are overly sensitive and fearful of new situations and strangers. I know many RR's who are 45 kg scaredy cats and that's not fun, especially as they mostly also have a low threshold for defensive agression.
I'd look for a breeder with a few generations of their own breeding behind their belt (as it is kind of a fashion breed at them moment, there are many breeders who have bred only a few litters by now... their dogs are not neccessarily bad, but it's way more difficult to say something valid about your breeding line when You only had a hand full of litters), who has a house full of dogs of a stable, reliable character and values a self-assured, anxiety free temperament in their breeding stock.