I recently got the Markbass 121P 12" Combo and so far it's been really impressive. I have a big gig coming up next week and I'm just a little afraid of pushing the combo beyond it's limit so I've been looking at adding a second cab. I notice a couple people with 121P and Epifani UL112 stacked. But I notice the sensitivity is slightly different (i.e., 121P 99db and UL112 100db). Can you guys tell me if the UL112 is better than getting a UL110 (99db) rated at the same db? What would be your choice? Epi UL112 or UL110 or MB 121H or Shroeder Mini12light. Thanks for your assistance.