Amie,

I also would recommend keeping the numeric values the same for familiarity reasons. However, I like LP which would stand for "LowProfile" series.

LP2
LP3
LP100
LP150

and why not a LP500, I need a new sub.

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