I get a 42 '' lg5400 for we room . with three kid the husband want to be able to sneak away and watch the game while the kid watch cartoon . somehow be stick with the small -lrb- black and white -rrb- college tv set seem unfair . when it finally break we upgrade . instead of buy speaker I look at a soundbar . I want to have great sound without wor about the wire or the kid move or grabe speaker place around the room . my friend be a audiophile and he have the 4100 then upgrade to the 5100 . he tell I the sound difference be minute I go over and try out he system . I like it and my 4100 sound the same . the difference be the 5100 have two 1 '' balanced-dome tweeter and the cost -lrb- approx 300 -rrb- ; perhaps there be audiophile with ear educate enough to tell the difference ... I be sure they would love to pay $ 300.00 for any subtle improvement . my friend who also install system also help I install the tv , dvd , Cable box and soundbar . the soundbar be also a receiver so the tv , dvd and Cable box be connect through the 4100 . we -lrb- my friend with I as assistant -rrb- update the Bios , install the bracket , mount the bar and calibrate the sound . the sound be perfect in the room no matter where you be but you can barely hear it in the hall even with the door open . so we can watch tv in we room when the kid be sleep . I have a electrical outlet put in the wall behind the tv and the wire be run behind the wall so no tangled wire and no wire visible to tempt the child . plus my husband can now watch the game -lrb- football , basketball or baseball -rrb- when the kid take over the tv in the family room . I would buy this unit again in a heartbeat .