The three I started purchasing were PMO, MHF, and MUA. (PMO was the only one I purchased that uses leverage.) I have been watching these three and their discount-to-NAV (as shown on cefconnect.com).
PMO pulled away this week with the highest discount to NAV since December. As mentioned on my Seeking Alpha StockTalk, I picked some up on Tuesday at $11.40 taking my average to $11.01. I'm continuing to watch and see if it drops again.
Disclosure: Long PMO, MHF, and MUA.