If Gerrard plays, I would like him to be flanked by Downing and Suarez rather than Suarez and Kuyt, it gives him more options in attack. Especially since Suarez is more than capable to drop back when defending.
If he doesn't, Kuyt on the right, Suarez on the shoulder of the giant. I know its a big game, but Gerrard & Suarez are very big game players for us too. Saying that, I think the manchester united game has probably come a bit too soon for El Capitan!
Will Johnson be fit? He could make a massive difference in tracking Ashley Young/Nani, but again, throwing him into the deep-end would probably make his injury re-occur. Kelly was ace againt them last year if I recall.