as per the posts before, V2+20 is the speed for the final segment climbs. At acceleration altitude I would accelerate to Venr (190 kts) and climb away at that unless a distant obstacle calculation prevented it.
So in the event of a failure at V2+20, yes I would hold that speed. If they both keep going I would keep accelerating to cruise climb, 250 kts and climb away at that. Actually, thats not quite true, I've been doing a load of maths and would climb away at my most fuel efficient speed but thats another story that I'm messing about with. And I don't fly enough to prove if thats right so I'm not going to mention it..
DOH!