SSDs are still relatively new compared to traditional hard drives. Longevity testing is not as extensive as hard drives. The way lifespans are being determined is by simulating intensive workloads for short amounts of time.
In my opinion, certain models are ready for server usage. Just as with HDDs, there are enterprise/commercial models (Seagate Cheetah 15K, WD Raptor, etc.) and home models (Seagate Barracuda, WD Blue, etc.) Some are more reliable and better than others.
The models I would recommend in low to medium-end servers are the Samsung 840 Pros, Intel 520, Plextor M5 Pro. All with 5 year warranties. For the high end servers, the Intel 710 with eMLC memory would be very reliable. Anything above that and you'll want to look into PCI-E SSDs like the Fusion IO.
Go with old, trusty hard drives, even they are slower, but hard drive technology is mature, even the warranty is longer 5 years...
The only hard drives that have 5 year warranties anymore are the high end/commercial WD and Seagate Drives (e.g. WD Black, WD RE4, Seagate Constellation, Seagate Cheetah,etc.). Almost every other has a 2 year warranty. It's basically a monopoly in the hard drive market with Seagate and WD being the top 2 and Toshiba bringing up the end. Nobody is exactly jumping to get in that field anymore...
Most of the time I need a drive to be replaced under warranty. I'll just buy it and get the other one replaced later on. The turn around times can be weeks. Even doing an advanced RMA is a headache and I'd rather just pay the money to get it ASAP. Amazon Prime makes that one day shipping nice for only $4. I just want people to be realistic about the warranty. Sure it's nice but don't expect it to be an immediate solution.
I've recently started using Samsung 840 Pros in servers. Samsung is a good brand and they were awarded several OEM contracts from various manufacturers including Dell. Intel is pretty rock solid as well. Though the two I use most at the moment are Samsung (5-10 in production) and Crucial (Over 20 in production).
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