Last month I popped in to ride out at Oliver Sherwoods yard in Lambourn and said hello to the legend that is Many Clouds, who won last years Grand National. He is very well and will carry my emotional support and some money. But he is the favourite, so you won't get better than 8-1 I suspect.
I think lower weighted horses like Druids Nephew and Boston Bob are very good each way bets at more attractive odds. If you want a long shot then Gallant Oscar appeals. But I will be cheering for Many Clouds.