Best PCI-e card(s) for MP 2009 and 2 SSD's?

I have a couple Intel 520 480GB SSD's that are left over from a server project and I want to use these in my Mac Pro (2009 w/5,1 firmware).

I'm looking for the least expensive option to get the maximum speed from these two SSD's.

Currently, I see this:

1) 2 x Apricorn Velocity Solo X2 -- If I use TWO of these cards, each with one mounted SSD, would I be able to get full speed from both SSD's, thereby giving me close to the 1100Mbs (550Mbps x 2) in a Raid 0 or 1??

2) Tempo SSD PRO PLUS -- This one card with two SSD's mounted to the card would max out the card at it's rated 960Mbps?

If option #1 works, then it would be the cheapest, since $89 per card is cheaper than one Tempo SSD PRO PLUS.

OR, are there other options to use my Intel 520's? Drueling over the XP941's but those are $$$, and these 520's, being project leftovers, carry no additional cost.

Thanks!

Do you know, of the 4 PCI-e slots, 1/2 are x16 and 3/4 are x4. But I read somewhere that to get the best speed from two cards, you have to use a special combination of two slots. It was like 3/4 use the same channel or something, I forget. I want to maximize throughput to/from the two Apricorn cards (I went with those and they arrived today).

Thanks.

@handheldgames -- so I'm assuming it's best to put a card in slot 2 and one in slot 3? Seems if I put them in 3 and 4, then that might not be best since they both go through a "switch"?

Just to update, I installed two Apricorn Velocity Solo X2 cards in slots 2 and 3, each card equipped with a 480GB Intel 520 SSD.

I booted to my existing boot drive on the Apple RAID card (2 SSD's in bay 1 and 2) and used Disk Utility to create a software RAID 0 of the two Intel 520's.

Wanting to clone my boot drive to the new Intel520 RAID, I booted with my Mavericks USB stick and ran Disk Utility. No matter what I did, I was unable to restore/clone the boot drive to the new Intel520 RAID volume. Kept getting error 32 "broken pipes" error. After trying almost everything, I gave up and installed a fresh Mavericks on the new RAID, booted from it successfully and during the initial setup, chose to transfer my info and chose the original RAID drive. After some time, it rebooted, and all my stuff was there!

I removed the RAID card, the SSD's from bay 1 and 2, and after a PRAM reset to fix a problem with the PCI-E fan running full blast when the RAID card is absent, I'm up and running on a new superfast RAID.

I ran the Blackmagic Disk Benchmark on the new RAID volume when it was first created (empty) and was getting about 950MB/s read and 460MB/s write. I was a bit surprised by the write speed as I saw the specs of the 520 showed write speeds close to 500MB/s so my reads and writes should be much closer together. Ideas??? Possible some write cache is turned off on the 520's?