I'm thinking the same type of thing.
The 990/7125 is $1900 and with the LFM1 its $2300.
I think for $400 it's a real bargin.
I need a sub, but can't spend $700 for the HSU VTF3.
The VTF2 is $500 and has a small woofer and less amp than the Outlaw LFM1.