I voted for mainly white ones, because I have allready a lot of black rockin' tshirt !
If you do the long sleeve with the web site on it put the logo not upside down (it is correct on the pics : when your arms are "driving" the text should be in correct position, it is a common error).
Anyway, I like most of not so classic ones. Baseball is cool, the polos (especially the white) are cool too, but may be eve, better with a coloured logo.
May a blue and yellow baseball would suit to the lfs style (and swedish will love it !)...