Since you have already owned a Honda motorcycle in the past and are familiar with the ownership experience, the Honda CB350 makes for a logical step up. This is a smooth, comfortable, reliable and decently fuel-efficient machine which should serve you well over a long period of time.
If you want to look outside the Honda umbrella, the Royal Enfield Hunter 350 is another great option to choose. The Hunter will feel lighter, more manageable, while retaining similar strong points to the CB350, like the torquey engine and comfortable ride quality.
The Royal Enfield is also a good chunk more affordable than the Honda, which is something to consider, too.
A test ride will help you decide which is better for you.