Ricred,
I'm just curious as to the size of your space. From the test data that I've seen, a pair of Ultras offers enormous clean output capability. Your observation that the JL does better on that front (and, to be clear, Im not contesting that observation) suggests either a huge space or crushing SPLs (or your Ultras not delivering what the test pair did).
BTW, test data is available at hits hack.com.
