All the B. weyerianas (yellow or cream) are quite vigorous but they can be controlled by hard pruning in April, keeping them to about 2 metres wide and high by August. Golden Glow is the least vigorous cultivar but only just.
There are weyeriana x davidii cultivars but these look just like davidii.

Buddlejagar,

Thanks for your comments. I think that my garden is too small to accommodate a buddleia.