I hate GU10's and their proliferation over the last 10 years means a lot of expensive short-life lamp replacements, and a lot of wasted energy.
The Hue versions are equally the most expensive lamp of the line-up, and the £50 price tag for the colour ones has always put me off, meaning the 4 lamps in the kitchen, bathroom and en-suite (200W per room!) would likely never be replaced.
I didn't know the White Ambiance ones existed, and Argos have them for sensible money. At £25 each, it still means I can't replace every one of the last 12 in the flat at once for THREE HUNDRED POUNDS, but at least it's plausible over time!