Didn't see the giant $$$ tag at the end of the page, but, roughly skimming the article, I saw, it said $900 bucks a pop, and then you need 24 of them? $900 X 24 = Quite a bit.

It seems that post was created in 2009, so I'm assuming prices have gone down though? I'm not much on computer specs, is this faster then the current system/how much faster? And is it really worth it?

 

Those are the old specs, the newest ones are as follows:

The server already has 2 SSDs in a raid 0, you could add more SSDs to the array but that decreases redundancy and probably wouldn't increase performance dramatically. Having fast I/O speeds is important for a minecraft server but there comes a limit where having extra I/O speed doesn't help more or the system is bottlenecked by something else, such as the CPU.

RAID 5 isn't designed for speed, which is what the server needs. You would also need a very expensive RAID controller. Having SSDs in a RAID 0 and keeping regular backup on a harddrive is fastest and best the server is going to get.
RAID isn't a backup solution, RAID can protect against drives failing but it is not a backup solution.

SSDs have dropped a lot in price and doubled in speed since then. The article was an experiment to test the limits of SSDs, this isn't a practical setup, for many reason. It would probably increase performance a bit but not enough to justify it. Also with RAID 0 if one of the drives fails you lose ALL the data across the drives, so one drive could bring the whole array down, this is why backups are important even with 2 SSD in a RAID 0. SSDs are less likely to fail then HDDs but it would still be a stupid thing to do, it could potentially cause more harm then good.

If the server wants to increase performance it would be better off removing useless plugins, reducing the amount of farms and moving sg to a separate server which is connected to the main server through a proxy server, aka bungeecord.

 

• XEON QUAD CORE E3-1290v2 (8M Cache 3.7/4.1 Ghz!)
• 32GB DDR3 ECC Memory (Fully dedicated to EcoCityCraft)
• 80GB + 2x120GB Intel 520 SSDs in RAID-0 (Fully dedicated to EcoCityCraft) + 1TB Backup
• Blazing fast dedicated 1Gbit/1Gbit connection (Check out the amazing speedtest! http://www.speedtest.net/result/1352613022.png)
• 30TB of monthly bandwith capacity
• Entire machine is dedicated to running EcoCityCraft and nothing more, providing the best quality experience possible!

The specs you're using are old, these are the up to date specs, as seeon on http://ecocitycraft.com/wiki/index.php?title=Server_Features#Server_Hardware

 

So these are the up-to-date specs I'm gonna quote from that link:

• XEON QUAD CORE E3-1290v2 (8M Cache 3.7/4.1 Ghz!)
• 32GB DDR3 ECC Memory (Fully dedicated to EcoCityCraft)
• 80GB + 2x120GB Intel 520 SSDs in RAID-0 (Fully dedicated to EcoCityCraft) + 1TB Backup
• Blazing fast dedicated 1Gbit/1Gbit connection (Check out the amazing speedtest! http://www.speedtest.net/result/1352613022.png)
• 30TB of monthly bandwith capacity
• Entire machine is dedicated to running EcoCityCraft and nothing more, providing the best quality experience possible!