MULTI-BOOTING LOADERS AND MANAGERS AND BOOT SEQUENCE CONTROL

I'm preparing to have custom-build shop do PC with three hard disk drives. HDD#1 will be regular/internal sort, 500 GB or less, dedicated drive for LinuxMint 10; HDD#2 will be SATA mobile-rack sort, likely 750 GB, for XP Pro with BrowserLinux on partition; HDD#3 will be SATA mobile rack, 500 GB or less, for trial of various operating systems (each on its own dedicated hard disk), such as PC-BSD, FortressLinux, etc. What are my options for multi-boot loaders, boot managers, etc., and control of boot sequence?
