I use RM, RS, LGX, LPX, VXL, JGX and RP chains and I use them a lot. I'm not the occasional cutter.
Let me be clear, I like all of the chains listed above as they all have their place (LPX/VXL/RM for dirty wood, RS/LGX/JGX for clean wood and RP (woodland pro/carlton) for ripping)... but they are not created equal. I buy Stihl chain from the saw shop up the street when I've been too lazy to sharpen.
I've said this a few times as have others... When it comes to chain, you simply cannot deny Stihl's superiority. You can flat out do more work in less time with Stihl chain, especially when comparing fresh out of the box chains. Why? Oregon/Carlton/Woodland Pro chain has to be tensioned pretty regularly, Stihl is ready to rock and roll even fresh out of the box. All other brands of chains take a while to stretch completely, which means having to stop. IMO Stihl chain oils better, it takes a hit (metal) with less damage and undeniably stays sharper longer.
If it weren't so expensive I wouldn't run anything else. Unfortunately, it's $0.44-$0.45 per drive link around here!!! For a 84dl's you're looking at almost $40 with tax!!!! Because of that, I only have 7-8 loops of Stihl chain. The other 15-20 loops are other brands.
In conclusion, Because of price, 1 loop of Stihl chain is worth less to me than 2 loops (with $ to spare) of Oregon.. Duh.
I need to break down and start buying rolls.. With that comes other equipment and expenses.