Calculate the dominant pole first. This is also the 3db bandwidth. p1 = GBW/Av. As I see, you have not specified any specification about the output swing. Trying the differenctial cascode amplifier is not a bad idea. If you need to do a two stage amplifer, then take care of the stability. The output impedance seems to be less than 100K for a single pole system.
Because you have mentioned two stage, miller opamp configuration can also be a good choice.