Another vote for Alto from someone who has tried them. Excellent, thank you.
Hah! The prospect of having something that is half the volume and 25% lighter week-in week-out far outweighs, for me, the prospect of an extra £30 or so resale value in 4 years time, if / when we come upgrade!
Besides the RCFs wouldn't quite be a matching set: the 310s I have are the older Mk2. And with happy Alto users crawling out of the woodwork, as they already seem to be doing, they are soon likely to be in demand!