If you are looking for a stronger earlier reaction from Radical I would Suggest the Guru Master.  It should be earlier than the Reax and should handle more oil.

I would suggest a Score. Cleaner than the Reax, same core. It is also on clearance in some places.

The Score and the Reax Version 2 are good options.  The Scores are on closeout most places.  If you are interested in the Version 2 and can't find one else where we still have one in stock at the shop.  Another option in the new line would be the Primo Solid.  I would think based on design intent that would fit in right between the two.

Since you said more backend, I would definitely go with a ridiculous. The ball is clean through the front and makes a strong move when it encounters friction. I've drilled 2, 1 pin up and another pin down!! I get about 3-5 boards difference between the 2.

From what I've seen with the hyroad, the ridiculous is stronger on the backend and a little more overall hook. You will love this ball, it's one of those special ones!!!