MySQL InnoDB vs MaxDB / SAP DB

[Uzi Klein]

Hello

We currently  run mysql 4.0.14 in MyISAM table format.
Server config :
Dual P-3 600
1GB of ECC SDRAM
 6 SCSI drives 10,000 RPM using RAID 5 Array.

OS :
RedHat Linux 9.

We just realized we really need the adnvaned futures of InnoDB or MaxDB/SAP DB.
What would it takes (System preformance, code optimization etc.) to do such un upgrade,
and what would you sugest as the most stable / reliable database / table format to suit
our needs?
(what we really lack right now is the use of foreign keys and replications).

Kind Regards

Uzi Klein
Web Development
BMBY Ltd