Need some advice about selection of FPGA devices(probably with PCIe interface)

What do you consider mobile? Your laptop or your cell phone? :)

If your laptop has an "ExpressCard" slot, then you effectively have a PCIe connector on the side of your laptop. You can use this to connect to a box that contains standard PCIe cards, eg., the MaxExpansion cube or the OneStopSystems micro-ATX motherboard (these two places are the same company)

http://www.maxexpansion.com/

http://www.onestopsystems.com/

As to which FPGA board to use. Don't buy anything until you have created some example designs.

Assume you have purchased one of the above boards; create a design for it. What are the resource requirements? Is the board sufficient?

Buy a board only after you have analyzed what you need to use it for. You have to create the HDL at some point, so start now.

Also contact the University Program. They may be willing to donate a board, eg., an older Stratix IV rather than a new Stratix V board. Free is good, right? :)

Cheers,

Dave