What the frame rate was when you recorded the video is literally irelevent. It literally cannot have any influence on how you record the file to any kind of storage device. After all, the file is nothing more than a string of 1s and 0s.
When recording to Blu-Ray, choose the lowest level of compression to preserve the best image quality. You also need to consider the playback device. If you're playing the video back on a 1080p HD television, then there wont' be much of a difference between the original file vs a slightly compressed copy. Unlike 50GB Blu-Ray discs, 25GB discs are relatively cheap thus making it reasonable to use one for testing purposes.
Make several files ranging from full resolution with no compression to the lowest setting that you think you'll ever use. No need to make long clips, just shot 10-15 second clips that will be long enough for you to judge the quality but small enough for you to fit many of them onto one DVD or a 25GB Blu-Ray. Again, the file itself is nothing more than 1s and 0s, so whether you record it onto a hard drive, thumbdrive, DVD or blu-ray, the quality will always be the same.