Yes, avoid OCZ and others with a SandForce controller for now; the number of firmware updates and serious user complaints are too high for something so mission critical as your OS/program drive for a laptop. Crucial (C300 or M4) and Intel (320 or 510) are both excellent choices and still perform very well for your intended purpose.
Even if you don't go with a larger laptop that can hold 2 or 3 2.5" drives, many laptops can take a SATA connected 2.5" drive bay in the optical bay slot. You would have to more your optical drive to a cable connected configuration, but personally I think this is more desireable than having the optical in the laptop and having to have a connected drive any for your data. Check out newmodeus.com if your laptop vendor does not have this option.
Regarding 2 drive capacity with your laptop, that is excellent!. I'd go:
1st drive - 120GB or 128GB SSD
2nd drive - 500 or 750GB HD
optical bay - Blu-ray or DVD burner
USB 3 - use for CS5/5.5 media cache, media cache DB, and render outputs to speed things up considerbly; also, if you are ever needing to run things without the USB 3.0 connected, you still can, it will just be a bit slower.
Regarding heat and power supply, that is a concern when CS5/5.5 is really working hard, however the big users of power and causes of heat are the CPU and GPU.
Be carefull with OCZ Vertex 3. 2 months ago I returned my 240GB Vertex 3, because totally dead after 3-4 months.I used in my desktop for Premiere Media cache and preview files.
Now it was Christmas time I went to countryside with my laptop, where I also used OCZ vertex 3 for system drive.3 days ago this ssd also completely dead.
First time I got back my money, and I bought corsair Force 3.Till now still works.Good luck.
Thank you all for your advices. I decided not to gamble with my OCZ. I read some firmware update pages and that looked so scary that I decided just to let it be.
I just got my new laptop, MSI GT683 and it has WD Scorpio Black 750GB as a system disk with Win7 Home 64 preinstalled. So I keep it and just fill all the four memory slots with
4 GB DIMMS. Also I add another HDD inside the chassis - yes it has an empty place for another Sata HDD.
Maybe later when I have more time and money I'll upgrade the system disk to SSD with Win7 Pro 64 and change the 4GB DIMMs to 8G ones.
One more thing about my OCZ:
This new laptop has also eSata connector. I have HDD docking station with eSata and USB2 connectors. I took my OCZ Vertex3 disk and connected the docking station with eSata to laptop.
A saw the normal brief info-flash "OCZ Vertex3.." but then nothing. The disk did not come in sight. I changed to USB2 connector, same problem.
Then I connected the docking station to my desktop PC, immediately the disk appeared.
Something is really up...
Maybe SSD with Marvell controller is the way to go, thanks Felix.
My laptop is now up and running.
The laptop is MSI GT683DX, now little modified:
i7-2670QM, GTX 570M (hack), 16GB RAM.
I bought Intel SSD 320 120 GB as a system/program disk and original WD Scorpio Black 750 GB as a data disk.
I also have external 2.5 inch USB3 and eSata disks as backup. Maybe I can use them for media cache and exports as Jim proposed.
So far everything looks good enough.
PPBM scores "103","194","95","8" from Scorpio Black.
The scores were little better from SSD only, but this is working combination.
That 400-second total time result is quite typical for an i7-26xxM series CPU, which (for the most part) does not have quite enough clock speed compared to its desktop siblings that have similar-looking model numbers. In fact, it is below the result I had achieved with even a default-speed, Turbo-Boosted i5-2400 desktop PC with a similarly fast hard disk.