SECRET INVASION: X-MEN #1 Cover by TERRY DODSON (This should definitely be released as part of the Marvel Legends line.)
SKRULLS VS. POWER PACK #2 Cover by GURIHIRU (The no Skrulls t-shirt should also be put on sale.)
And here's my choices for best covers for the Marvel Comics Solicitations for August, 2008.
SECRET INVASION: THOR #1 Cover by GABRIELE DELL'OTTO
IMMORTAL IRON FIST #18 Cover by TRAVEL FOREMAN
See all of the Marvel Comics Solicitations for August, 2008 here.