The Lore does have more bottom than the Lore-S, and it also plays louder with lower power. I think the Lore is better suited for your music than the Lore-S, and is a HUGE value. I've read that it gets stupid-good with some crossover tweaks.
If you are looking at LS50s, I also heard about the Cambridge Audio Aero 2s as being a great value at $500/pair. Front ported speakers are going to be your friend if you can't place the speakers out much from the wall behind them.
Also worth mentioning - your room is not very wide, but it is deep. With music playing, as you walk towards or away from the speakers, you are going to (most likely) hear heavy bass peaks and nulls. So ideally, you'll be able to move your listening chair forward/back a few feet to get a balanced sound...
Keep us posted!