you should test the market on shockey and heap. i think the general value for shockey is higher but heap will get you about the same points without all the flash. id offer trades with shockey first and then if not accepted, offer trades with heap. it makes other players think that you are "upgrading" your offer by making a second one although you could offer heap first and then shockey and they might think that they are getting a steal because of it. thats a mind game you have to decide.
also, you might want to consider picking up ladell betts. he showed a lot of promise last year(spec. 49ers game) and he could atleast be a starter for week 1, maybe more.