Which dog out of these would suit me the best?

A lab and a golden might need too much exercise for a small house and a small yard but it could work if you are high energy too and willing to commit to a lot of long walks/runs. Never get a dog that is higher energy than you are. You won't be able to keep up. Beagles howl and love to wander, they also need a lot of exercise. Cavs need less exercise but are still spaniels and like a good long walk and to chase. This might be the quietest of all the breeds you mentioned. Poms and paps probably need less exercise yet. Yet, both of these breed can yappy- but some can be trained not to. Honestly, I'd go witha shih tzu or shih tzu mix- quiet, not high energy, low shed (depending on what they are mixed with), easy going, very low prey dive and generally likes everyone.