[illumos-Discuss] SSD vs "hybrid" drive - any advice?

[Gordon Ross]

I'm looking to upgrade the disk in a high-end laptop (so called
"desktop replacement" type).
I use it for development work, runing OpenIndiana (native) with lots
of ZFS data sets.

These "hybrid" drives look kind of interesting, i.e. for about $100,
one can get:
  Seagate Momentus XT ST95005620AS 500GB 7200 RPM 2.5" SATA 3.0Gb/s
with NCQ Solid State Hybrid Drive
  http://www.newegg.com/Product/Product.aspx?Item=N82E16822148591
And then for about $400 one can get an 250GB SSD, such as:
  Crucial M4 CT256M4SSD2 2.5" 256GB SATA III MLC Internal Solid State
Drive (SSD)
  http://www.newegg.com/Product/Product.aspx?Item=N82E16820148443

Anyone have experience with either one?  (good or bad)

Opinions whether the lower capacity and higher cost of
the SSD is justified in terms of performance for things
like software builds, etc?

Thanks,
Gordon