I just picked up a new rig with a Peavey CS800, Peavey preamp and a BBE sonic maximizer. I bought it used with a Peavey 4-10 and a Peavey 18. I was thinking about selling the 18 and getting a matching 4-10 for a total of 8-10s in two cabs or just getting an 8-10 fridge. I was wondering what your opinions were regarding an 8-10 set up vs the 4-10 with an 18 on the bottom. I do like the way you can "feel it" more with the 18. I had been borrowing a friends 800RB with 6-10s and always wanted more rumble. If I go with the 8-10s, will I loose the rumble I'm getting with this new stack?