I've been gone awhile (lots going on here) but thought I'd pop in and say "Hi" since this is a collie post! I'll agree with what the others have posted, although energy level varies more from bloodline to bloodline ... there are a lot of couch potato Collies out there these days. (Thankfully not mine!)
Healthwise, your main concerns are eye problems (Collie Eye Anomaly and PRA), hip dysplasia, MDR1 (drug sensitivity) and hypothyroidism.
Lizzy - pm me. I have a friend with a new litter of sable smooths, all DNA-ed CEA non-carriers and maybe MDR1 normal/normal too.