Sliders for me. Intend on doing some gnarly tracks with the grenadier, and the sliders are looking very well built.
Edit:
A little story behind my decision! Was in the Spanish Pyrenees in 2017 with a couple of mates doing an all off-road trip from Andorra to Girona. We were in 2 jeeps (my JK 2 door sahara on 34s, and my mates JKU rubicon on 37s) and a discovery 4 on 32" KO2s. We were a few days into a long route that snaked in an out some tiny Spanish villages, very early in the season so first people on a lot of the tracks.
We'd been on one track all day, as it wound its way down a mountain towards our camp spot, when we rounded a corner and came upon a big (almost a meter high) boulder that'd slipped down onto the middle of the track. This was a mountain pass, so no way around, and sheer tree lined slope flanked us on both sides. Being so far along, we didn't even consider turning back, and started packing some rocks to get the vehicles over it. The 2 Jeeps crawled it no problem, with sway bars disconnected and great clearance, only casualty was a number plate bracket (my fault as i gave it too much mayo and cracked it on a tree on the way down!).
Then came the disco. He had some beefy rock sliders that he'd fitted just before the trip, and damn did they pay for themselves! We had packed some extra rocks either side to decrease the ramp angle from what the jeeps had climbed, but once up on top, the disco spun some of them out and slipped, coming crashing down onto the slider. There was nothing else we could do, but let that 3 ton vehicle drag itself off the rock, taking a hunk of powder coat off in the process. Had he not had those sliders, I cant imagine how bad the sills and door would have been damaged. For peace of mind, theres not an easier mod that will save soooo much money.