I have not heard the Graham speakers but I have heard and owned several pairs of Harbeth and Spendor speakers.
For my money the Harbeths are better than Spendors.
My hunch is that it will be hard to beat the Harbeths on sound, and without a doubt the brand equity that Harbeth has will ensure that availability, tech support and resale value will be higher than a fledgling brand.
If you're able to listen to both and do your own comparisons go with the speaker that moves you the most. If you're unable to do so I would recommend going with the speaker that you can gather the largest number of positive user impressions as possible.
For my money the Harbeths are better than Spendors.
My hunch is that it will be hard to beat the Harbeths on sound, and without a doubt the brand equity that Harbeth has will ensure that availability, tech support and resale value will be higher than a fledgling brand.
If you're able to listen to both and do your own comparisons go with the speaker that moves you the most. If you're unable to do so I would recommend going with the speaker that you can gather the largest number of positive user impressions as possible.