Well if you really like
to climb stuff, sounds like 4. I'd LOVE to get mine up to 2.5
I suspect why we might hear 2.5 is "better" than 4 is the Real Extra Strain on all the hardware, probably requiring more mods and/or heavier duty parts to keep it all in check. But I'm not expect as you can see by the current state of my 'lowly' rnr below. It has a dream.... :banana: