Problems you're run into: MySQL version. Perl Version.
Insure the software you're going to buy is MySQL 5.x and Perl 5.8 compatable.
MySQL one is important; ALL 3.23 MySQL scripts are NOT compatable with MySQL5 and a good mount of 4.x MySQL scripts aren't compatable with 5.x.
5.0 -> 5.8 Perl isn't that bad, but there are some inconsistancies that will need to be verified before hand.
Those specs are a downgrade, not upgrade.