To make a long story short, I will be moving my beam to another
tower, and will have a rohn 25g tower that is imbedded in concrete
approximately 50 feet away from the house. I would like to get a
decent lower band antenna (not 160). I'm wondering what would be the
best scenario:

Hi Terry, My suggestion would be extend the tower as high as possible, and hang
a 135' inverted vee, fed with open wire line. Of course you will have to use
an antenna tuner and balun at the shack, but this antenna will work will work
really well on your bands of interest. This would be a "best all around"
antenna.
If your interest is solely dx, then a vertical or inverted "L" with lots of
radials should be the way to go. The radials are a pain, compared to the ease
of the vee mentioned above.

73 Gary N4AST