If you want to get really adventurious you could do option 1 with a
detour up to the Volcano Puy Mary This is the one I would do ;)
From Aurillac cut through the centre and take the D17 up to Puy Mary,
at the top of puy Mary hang left down the D680 until you join the D922
to Mauriac where you take the D678 to the D105 Chalvignac cross over
the river Dordogne onto the D16 to Egleton and then D16 to Treignac
and Riders Rest- From Aurillac to Puy Mary and to the D922 the roads
are quite narrow but twisty and the views are spectacular.
From Mauriac the roads become narrow again and the surface
is uneven but can be fun (and you can imagine the French
Resistance scamoering through these hills) . This one
is 201 Miles and is going to take you about 7 hours with
stops though you may stop more often for photos.
View from Puy Mary
D17 from Aurillac