Sciphone's Versions and European Shops

Hi mates, i was thinking to start to work also on Sciphone and starting to learn as much as i can and contribute to the community (even if actually i'm a noob of phone firmwares, i worked only on MIPS router firmwares ). Have you some usefull books/wiki/etc to start on? These are the 3 versions identified of Sciphone: HY27XS08121M - 512Mb (64MB) NAND + 32MB RAM HY27XA081G1M - 1Gb (128MB) NAND + 32MB RAM TC58NVG0S3AFT - 1Gb (128MB) NAND + 64MB RAM How i could ask to sellers for the best version? (TC58NVG0S3AFT - 1Gb (128MB) NAND + 64MB RAM) Do you know an european shop where i can find it? Thankyou for attention folks Regards Luca