Something I would warn you about. LG, is definitely not worth buying. Bought one about 3 or 4 years ago when our Bosch dual fuel died. In the end I wish I had kept the Bosch (even if it meant spending over $1000) to repair it. Yeah the LG is that big a POS. Honestly I would not give a plugged nickel for Frigidaire/Electrolux either. Oddly I just helped my dad buy a new range from ABT in Glenview IL. Truth be told in the $800 to $1200 range they had there, we settled on a GE. Now for the record I truly dislike GE stuff. They do not make appliances anymore. Their stuff is made in China by Heier. But, I have to say so far this GE works quite well.
As for 5th burner. On a 30" range it's difficult to make use of. Anything you have on it precludes use of any of the other 4. So there's that. On ours it's used only for a griddle and I had to do a little modification to the burner output to even get that to work sufficiently.
Honestly though I cannot wait for the LG to just die. So I can get another Bosch dual fuel. Truly was a very nice range