What JL Subs to pair with Harbeth SHL-5 Speakers?

Room is 27x16x8, and considering SHL-5 speakers with a pair of JL Subs instead of going with the 40.1 Harbeth. Trying to decide betwen F-112 and F-113. Leaning towards a pair of Fathom 113 Subs with the SHL5. Any comments.