pcie ssd

Sorry, misread your post, not sure will be my escape line. 🙂

Just what do you mean?

Provide link(s) to the hardware you are considering.

Pretty much anything, whether SATA III PCIe SSD / PCIe-SSD blade + adapter.

The newest non-AHCI Intel 750 PCIe-SSD is only device that is NOT supported, not in or on any Mac in any form.

http://www.storagereview.com/intel_ssd_750_review

Amazon: http://www.amazon.com/Kingston-HyperX-2-5-Inch-SH103S3-240G/dp/B007R67FTY/ref=sr _1_1?ie=UTF8&qid=1434313697&sr=8-1&keywords=kingston+hyperx+ssd

I am partial to Samsung - EVO 850 ($99 250GB) or XP941 and SM951 devices ($25 adapter, $250 256GB device - 800-1500MB/sec)

Blades w/ adapters are of course the fastest possible devices.

You need a controller (not adapter) and SATA III PCIe to get the most out of an SSD otherwise. (500MB/sec vs 250MB/sec on the native SATA II drive bay)

Any SSD is going to make a difference. And 250GB makes a nice boot drive (user data.media on 2nd drive)

That one look fine