upgrading Rogue 88 vs monoblocks


I've been running a Rogue 88/99 combo(non-Magnum)versions.
I have the upgrade bug and want to know if anyone has compared the 88 Magnum vs the 120 monoblocks. How would you describe the difference and how would I benefit compared to the non-Magnum 88 ? Thanks in advance.
bigo
I was told (by someone at Rogue) that the magnuming of the 88 is the least valuable of the magnums. Plus the extra power has to help. My 88 definately pooped out when really pushed.
I heard a big difference when I upgraded my 88's. Plus you get new tubes. Well worth the money IMO.

I then upgraded to Magnum 120's and I preferred the high end (less forward and from 'blacker' background) and better separation.

Still not enough power for my Maggie 1.6's though.