Hybrid SSDs make me nervous for audio use. Not like I haven't facts on them and their stability/performance for audio but... information moving between multiple parts of a disk so it can be accessed just makes me very very nervous. Someone like bandcoach or someone else more knowledgeable may have more insight but... I wouldn't be comfortable using them for audio.
The price on SSDs has come down enough to just get one IMO. SanDisk Ultra Plus is a great price/performance option.
Although I said Hybrids (SSHD's) are unreliable, that was something I only heard over 2 years ago. I am well pleased with my Seagate 8GB SSD+64mb cache+2TB 7200 RPM hard drive. I have only had an issue when trying to do a Recovery. But I usually have had issues in the past with whatever system I am running, when doing Recovery. Other than that my Seagate has had absolutely no problems. One thing to consider still at this point in technology is refraining from "Incinerating" an SSD or an SSHD. At this point it will ruin your SSD or SSHD. I have done it to my Intel SSD 520 Series and it still runs fine, but it will not optimize quickly anymore. Operating wise it still seems just as quick but possibly a little less "well". I highly recommend an Intel 530 Series and I believe you can "incinerate" on them without causing malfunctions and errors. I might be wrong. That's a question for Bill.
Sandisk has a reputation for low reliability and in fact was designed for purposeful failure. They are not recommended for normal use. Please refrain.
Intel is the leading SSD and computer tech. They are the best and most reiliable. They cost just dollars more here in these days: 11/2/2014.
Here is a link to some 530 Series that are becoming more and more less expensive. I found a deal on Slickdeals.com for an Intel 530 Series 480GB for 240 US dollars. Here at Amazon.com it is less than just 10 dollars more currently than my previous stated deal! Great deal seemingly when actually they used to retail and sell for maybe around 480 US dollars.
Intel 530 Series read/write times are around 540/480 Mb/s. That is 540 Mbs Read/480 Mbs Write.
Many SSD's on the market only read and write at about the same speed as a good SSHD (hybrid): about 200 Mb/s. A good Standard 7200 RPM HD can go near 151 Mb/s while all 5400 RPM drives only reach near 99 Mb/s: and some go only (3 Mb/s!)
Amazon.com: Intel 530 SERIES 480gb 2.5-Inch Solid State Drive Reseller Kit (SSDSC2BW480A4K5): Computers & Accessories
There are also some smaller size Intel SSD's here at Amazon.com which are also great deals!
https://search.yahoo.com/search?p=intel+530+deal&ei=utf-8&fr=chr-yie11
I love my SSHD for smoothness. When I play BF3, (look me up Anthony Lowery) it runs ultra smooth. While it only claims it goes about 33% faster than a standard HD which is I'm guessing a 7200RPM 150 Mb/s HD; I still believe it helps enough to make me pleased while playing BF3. greater start-up times are not hardly noticed nor drum samples for Audio. But it does run much more smooth than my previous HD's.
It's hard to say what will happen in the holidays for prices. I think the prices usually goes up. Perhaps you may find some deals though- in the near few months; but I think not. By the way, some tech supports for such as Dell, for instance, are up on the upcoming trends of SSD's. Knowing when prices will escalate according to weather and catastrophy: causing prices to fluctuate from overseas SSD factories.
You might just want to seach query "deal" with what you are looking for. It's my best trick!