I really like 'Emerald Carpet' (A. uvs-ursi x nummularia). It can take more shade, has nice flowers, and is a little moundier and more compact than the other A. uvs-ursi selections. The potential downside is it's less hardy (10 F or so).

There's a form called 'Wood's Compact' that is closely related to A. uva-ursi 'Radiant' but more like 'Emerald Carpet' in form. I haven't grown this one and don't know much about it.

'Massachusetts' is supposed to be leaf spot resistant. This is the main issue with local plantings of Arctostaphylos of most kinds, that pretty much trumps other concerns. Plants can be - and often are - long-established, obviously succeeding yet heavily infested.

Thanks bboy, I hadn't thought of that. Leaf spot can make the plant look rather ratty alright.
Mike

'Massachusetts' is adapted to semi-regular summer clouds and rain. It'll do best in morning sun and with a few waterings a month. I tried to grow one of these in my west-facing xeric bed a couple of years ago and the older growth kept dying.

FWIW, my 'Emerald Carpet' does not have leaf spot issues, either.