Actually Dr. a DSP sub can give you better performance as it won't distort at 120-125dB's like non-DSP subs, to me that is worth the small increase in price. Not to mention the controlled frequency response provided by the algorithms in the chip.

M80s VP180 4xM22ow 4xM3ic EP600 2xEP350
AnthemAVM60 Outlaw7700 EmoA500 Epson5040UB FluanceRT85