Also consider the possibility that "upgraditis" could set in if you go with the 2 lower priced/lower performance subwoofers especially if the higher performance/priced sub was within your financial reach. In that case, it would be wiser to get a single more expensive sub first as it would save you cash in the long run. After you get the 1st sub, skip a burger a day and save the cash for the 2nd one 6 months later. It does require patience.
If you feel that you won't be affected by "upgraditis" too soon, you could go with the dual HSUs. "Upgraditis" is a common disease among audiophiles (reason for this comment).
If you feel that you won't be affected by "upgraditis" too soon, you could go with the dual HSUs. "Upgraditis" is a common disease among audiophiles (reason for this comment).