I've heard that both Embrace and Pet Plan are very good. I have Embrace. Get it when the pup gets home, full coverage $10K a year, no Rx, no dental, no maintenance stuff. Then once they get their clearances for hips, heart, elbows, patellas, thyroid, eyes, at around 2 yrs, we switch to accident only (which covers cruciates and bloat). BUT that's because we have so many. If I had one, I'd probably keep the full coverage. Never have had to use it yet. Knock on wood.
Don't procrastinate. All it takes is to find an elbow or hip or some other "surgical" problem at 20 weeks and you cannot get the coverage. Then you'll kick yourself.
Hope it doesn't happen...but it has to far too many. Be prepared say the Boy Scouts! ;-)