Oracle Database Discussions

I am curious to the cost/performance benefit people have seen going to SSD drives.
We are now in the position where we are spec'ing out hardware.

I've never implemented on SSD drives, but what's being purposed now is going with strictly
internal SSD drives over a disk cabinet connected to the server.

While I've read some articles on SSD, What I can't really fine an article on is this...
For concurrency / throughput, how do you equivalate N SSD drives versus a dedicated disk array.

I am being asked why we can't take a 500G database that is on a disk cabinet with 14 15K drives in it (Raid 10), dedicated fibre and
just put it on 2 1TB SSD drives that are simply mirrored sitting as internal hard drives. The I/O to this database is about 90% read, a fairly decent amount too.

It would seem that while the SSD is faster compared to a convential HD. What is the concurrency and bandwidth of a single internal SSD drive compared to an entire disk cabinet with 2 raid controllers and 14 15K drives.

I would certainly push for as many SSD drives as I could get, and an internal Raid controller over them.
But I am in new territory here for me. Does anyone have any articles they recommend. Or better yet has anyone here ditched a dedicated disk cabinet (MD3000) for internal SSD's before?