First, let me welcome you from Texas to DC!! :wave:
At 5'11", 195 lbs., I carry a Ruger P95 IWB daily & love it!!! I find it a perfect blend of cost, reliability, quality, simplicity, effectiveness, safety, rated for +P ammo, & 15+1 capacity. It's no bigger or heavier than any other conventional semi-auto with 4" barrel & double stack magazine, so it's not huge, but it's not small either, it is medium size & weight. I can tear it down to 7 main parts & re-assemble in just under 30 seconds with no tools, easy for cleaning & lubrication. I paid $300 ea. including S/H and FFL fee NIB.
After I had mine for 6 mos, I purchased a 2nd. P95 to stay at the house for my wife & 15 yr. old daughter when I'm not home, as I leave at 3:30 a.m. daily. Mine is blued, theirs is stainless. I've trained both on the P95 & they have both put about 200 rounds through the new one. I've put 1500+ rounds through mine & not 1 failure on either, once I got my daughter to stop "limp-wristing" & causing a couple stove pipes. This was a great opportunity to train on clearing jams, & also what was causing her jams & how to prevent limp-wrist jams. They both know where the spare is & what to do with it once in hand. If & when my wife ever carries, this would not be her choice ... too big / heavy, but she has no problem with it for home defense.
Both of mine are the version with the combination safety / decock lever. I like having a DA on the first shot for safety purposes, and SA on all follow-up shots, with a decock lever to drop the hammer down back to DA & safety condition when done. I also prefer a hammer that I can pull back for SA condition on the first shot if time & presence of mind permit.
Once holstered, I take the safety off to carry for the day in DA mode, ready to draw, point & shoot DA on first shot ASAP. As I unholster for bed, changing clothes, restroom, etc., I move the decock lever back to safety condition whenever I'm handling the gun un-holstered.
For IWB holster, I simply use a cheap generic nylon with a metal clip. It does the job that I need it to, but I have no other basis for comparison. Your brother will not be disappointed with the P95. I do recommend the safety / decock lever combo model over the decock only model just for the added level of safety.