I bought a new 60gig360 system last year and had Microsoft send me a transfer kit and use xport360 due to having a 60gig hd and i think it's better than explorer360 and as far as game saves, i backed up all my game-saves to PC and disc and just re-downloaded all the content as long as it's still on the marketplace or download history....
ASUS M3A32-MVP Deluxe- AMD 64x2 6000 windsor 125w- 4 gig OCZ gold ddr 800- nvidia MSI 8800gt 512 OC- Audigy 2zs platinum- WD 250g sata 3 16mb -1 liteon dvd r/w non combo- Vista ultimate x64 -Antec 900 gamer -Coolmaster pro 650 psu