I have gone the mid range (not PIAA, but not Amazon cheapos) route and have been happy. Two pencil beams on the roof rack plus two pencil/floods aimed slightly to the side, plus one flood on each side and two floods on the rear. I like the rear floods on the roof rack vs rear bumper because they don't get blocked by obstructions as easily when you're backing up. For simplicity my backup lights are on a switch not switched to the actual backup lights (plus when I'm backing up in public I don't blind anyone behind me).
I switched all my driving lights (using relays) to only come on with high beams, so when I dim my lights all the driving lights go off, hopefully that keeps me from getting tickets. I do know it's probably quite the load on the alternator when I flick everything on and off at the same time (roof rack lights are LED, brush guard lights are older incandescent). I only use the roof rack lights off road, I do use the brush guard lights on the road when no one is coming at me (I swear that's still a thing, you know, dimming your lights to oncoming traffic, all evidence to the contrary
If you do roof rack lights for off road, while I do really like the pencils on dirt roads at night it's not like I'm at risk of overdriving my lighting on a dirt road (this isn't a baja prerunner truck), I've really liked the combo pencil / floods that I have on each corner of the roof rack, really lights up the sides of the roads if I'm looking for a turnoff or a place to camp.
One thing I would consider if you're looking for true "fog" lights (which you might be based on the fact that you're thinking yellow) they need to be really low to be useful... if I had fogs mounted on my brush guard (Quigley 4x4 so pretty high up) they wouldn't be usable in fog / heavy weather because they're not low enough to cut under the fog, they would just reflect back in my eyes. The roof rack mounted lights are deadly in heavy fog, much worse with them on then off. On a tall rig like ours not sure how to get a light low enough to be a true "fog" light without risking ripping them off everywhere.
I've been buying my lights off superbrightleds.com, they seem to have a pretty decent sweet spot (not PIAA expensive, not Amazon junk that all the reviews say you have to silicone when you buy them or they'll leak... not that there aren't probably better quality things on Amazon just hard to tell the difference a lot of the time). superbrightleds.com is also a good source for bulbs for interior lights when you're going all LED inside.
My 2 cents.