5v tolerant FPGA Development Board

[ROBOT]

I am looking for a cheap devboard that has 5v tolerant Input (input and output is preferred) that can basically act as a DAQ for a few simultaneous differential rs422 signals ( I think I can interface this directly to lvds?) then send the data with like a time stamp to a PC for analysis of the signals. (similar how a scope exports to CSV files)


It needs to store about 2-3 seconds of data for all the signals.


The signals digital signals would be:
3 differential signals at upto 7Mhz
3 differential signals at upto 5Mhz
About 10 signals at upto 500Khz(faster would be nice)
An on board 2 or 3 channel differential 10-14 bit ADC would also be nice.
USB interface would be nice.( How fast could I get the raw data out via USB? Do they support usb 3.0 transfer?)
On board 3v3 and 5v output would also be nice.

[Scrts]

Why don't you want to do it properly using RS422 transceivers?