Plextor M5s for cheap fast/ Plextor m5 pro Xtreme for premium fast is what I'd recommend. business class quality checks, really long life. Check out jonneylucky (howeveryouspellthat) and his website for a database collecting all of the reviews. As for decent price/performance I'd recommend Sandisk SSDs, as they tend to deliver top tier performance with great reliability at a lower price. They just started selling a new drive too, the Extreme II series. The review is on the Toms home page. OCZ reliability is spotty, and I'd recommend staying away if possible, although they may have fixed it. Why take the risk when there are so many other alternatives?
SSD+HDD is great for people who are good at organizing. SSHDs and Intel SRT is for lazy people bad at organizing, your choice, but the SSD+HDD route offers more freedom and greater performance if done right. WD Velociraptor should be a waste of money unless you are into video editing. Remember, high RPM=faster death. I recommend WD Green drives as they provide cool reliable storage, and you really don't need speed for bulk data. But if you want a bit of speed, go for the WD Black.
As always storage is still rather imperfect, so I'd recommend not using your dough on the absolute fastest, but to save your money and invest in a good external backup drive, as failures are way too frequent.