SSDs have been in data centers for years now. They are more reliable than hdd. That wasn't always true, but it is now. You don't use them for "low write/high-bandwidth", you use them for high iops/random access like database indexes, or the entire database if you can cost justify it. I have never seen a linux server lockup when copying files to/from and we have thousands of linux servers, you might need to tune something if that is happening. We have multi-tiered storage with 7200/10000/flash drives. The downsides to ssd are cost/data density, otherwise hdd would be dead, the noise/power/heat/performance difference is huge.
Virtualization is awesome! Servers have been increasing in performance every year while server applications resource usage grows at a slower rate. It's ridiculous to buy a server for a webserver application and another for network filesystems and printers etc. You also have to manage heat dissipation and worry about power/network/fc cables to a bazillion servers. With virtualization you can downsize your server farm(and the network/power/fc cables) 20X+ and save on hardware/cooling/power/management. If a virtual server needs more resources you can vmotion it to another server with more available resources, you can even have the process automated. With san storage you can carve out servers anytime you want. It used to suck when a server died because of hardware failure and you were down until it was fixed. Now you can bring it up in another frame!