The 1U4500 also features "Quick RAID", which builds a RAID "within minutes on first use" as well as RAID migration and RAID expansion features.
Thecus will offer the 1U4500 both with (1U4500R) an without (1U4500S) a redundant 250W power supply. Both will be available later this month at suggested MSRPs of $1400 and $1100 respectively.