[gentoo-user] {OT} Need a new server

[Grant]

It's time to switch hosts.  I'm looking at the following:

Dual Xeon E5-2690
32GB RAM
4x SSD RAID10

This would be my first experience with multiple CPUs and RAID.  Advice
on any of the following would be greatly appreciated.

Are there any administrative variations for a dual-CPU system or do I
just need to make sure I enable the right kernel option(s)?

Is the Gentoo Software RAID + LVM guide the best place for RAID
install info if I'm not using LVM and I'll have a hardware RAID
controller?

http://www.gentoo.org/doc/en/gentoo-x86+raid+lvm2-quickinstall.xml

Since RAM is so nice for buffers/cache, how do I know when to stop
adding it to my server?

Can I count on this system to keep running if I lose an SSD?

Is a 100M uplink enough if this is my only system on the LAN?

Is hyperthreading worthwhile?

Any opinions on Soft Layer?

- Grant