A rifle for home defense in the suburbs is not responsible and a poor choice. You do not have the right to endanger your neighbor's family in your own self defense.
Bullcrap.
This is, in fact, exactly the opposite of reality.
The reality is that all rounds that will realiably achieve adequate penetration for defensive use will also penetrate several typical interior walls. The reality is that this risk is always minimized by ammunition selection, and this remains critical for rifles as well.
The reality is that rifles are the current first choice for many professionals fighting indoors. While most of these are 5.56mm carbines, the advantages of proper ammunition selection combined with the increased velocity afforded by all rifles over handguns and shotguns means that a semi-auto carbine, when properly loaded, is not only more terminally effective, but also poses less of a risk of over penetration or collateral damage than many defensive handgun rounds. This is due to the increased tendency of most expanding rifle rounds to fragment upon hitting solid objects.
The reality is that if you have neighbors twelve feet away, you don't need to be shooting towards that wall, with anything. Or if you do, don't miss. Because regardless of whether it is a 9mm with a quality JHP, 00 buck, or a .311 caliber JHP from an AK, it's probably ending up in your neighbor's kitchen. That is an issue of tactics and it applies to handguns and shotguns, as well as rifles.
And the reality is that most people finding hitting quickly under stress much easier with a rifle than a handgun. Since only hits matter, and since misses with anything pose such a risk to those around us, this is a very important consideration.
The issue here is proper bullet selection, which is what the OP is interested in.
For home defense, I would recommend Wolf's Military Classic 124 gr JHP. This round, unlike many others for that cartridge, has been demonstrated to expand and fragment reliably while offering near perfect penetration for defensive duties. Most of the accounts I have read of this round being tested end up with it being recovered after penetrating 14 to 16 inches of geletin, reaching a maximum wound diameter of about 5 inches after about 8 inches of penetration, with a recovered bullet diameter around .6 caliber and retaining about half of its original mass.