Papagolash

I'm a complete noob to DCS so apologies in advanced for any dumb questions I may ask. I want to play the F-22, so I know I need to buy FC3. Once I buy and install it, and download Grinnelli's F-22 mod, do I then get the Nightstorm mod? Will that give me the best experience so to speak? I have DCS for Steam but I'm wondering if I should get the version from the DCS World site instead. Would that be better for the F-22 mod, or does it not matter? And lastly off topic question, is there a way to get the F-14 that I bought on Steam to work with the non-Steam version if I go that route?