if i was you, i look into the below areas rather than reading some one's reviews about the hardware ....
why do we need to migrate? (resources exausted on the existing server or??)
what is the current work load on 440? (cpu, memory, I/O etc)
what is the expected load on the new server?
what type of setup we are planning (stand alone or HA)
what is the expected DB growth (in terms of number of concurant users / data)
and so on .....
then deside what will be your new hardware.
Thanks,
Vijay Tummala
Try hard to get what you like OR you will be forced to like what you get.