Those are my thoughts too Steve. I use Xtracolor enamels now and then, and in general they are very good, although better when sprayed, as brush application sometimes results in air bubbles on the dried surface.
But they do have a slight disadvantage, taking some time to dry fully. Also, as they are gloss (apart from matt interior colours), designed to be 'decal ready', this can be a bit of a nuisance when using various washes, pastels or other 'weathering' effects.
That said, with the still-present inconsistency of the once superb Humbrol range, I'll have to order via internet sources in future, and will probably use Xtracolor, and maybe some Model Master (although I'm not keen on their bottles, rather than tinlets), if the WEM range does disappear.