We bought two identical high end laptops
One had a Samsung Pro SSD and 7200 rpm HD
One had Seagate SSHD
They were used by several people in the office for AutoCAD and general PC use, including gaming, and no one could tell the difference between the two ... except for me. I was the one who had to clean off the C drive when the 120 GB SSD got full.
As for what to use, take a peek at what the custom laptop vendors are offering as storage options
http://www.lpc-digital.com/sager-np8278-special.html
1 TB HGST Travelstar™ 7K1000 7200 RPM SATA 6Gb/s Hard Drive - Special! $0.00
Crucial® BX100 128GB SATA 6Gb/s SSD $35.00
1TB Seagate® Solid State Hybrid 8GB SSD ST1000LM014 64MB Cache SATA 6.0Gb/s $60.00
SAMSUNG® 850 EVO 120GB SATA III SSD $65.00
Crucial® BX100 250GB SATA 6Gb/s SSD $75.00
2TB 5400rpm SATA2 Hard Drive $85.00
SAMSUNG® 850 EVO 250GB SATA III SSD $110.00
Samsung® 256GB 850 Pro Series SSD with 3D V-NAND Architecture $150.00
Crucial® BX100 500GB SATA 6Gb/s SSD $170.00
Intel® 730 Series 240GB Solid State Drive SATA 6Gb/s $170.00
SAMSUNG® 850 EVO 500GB SATA III SSD $230.00
Samsung® 512GB 850 Pro Series SSD with 3D V-NAND Architecture $325.00
Crucial® BX100 1TB SATA 6Gb/s SSD $370.00
Intel® 730 Series 480GB Solid State Drive SATA 6Gb/s $375.00
SAMSUNG® 850 EVO 1TB SATA III SSD $455.00
SAMSUNG® 1TB 850 Pro Series SSD with 3D V-NAND Architecture $625.00