Need to replace the pads on my Avid Juicy Fives. Any recommendations?

Avid pads?? Others?

And what's the difference between sintered, organic and semi-metallic pads?

I mostly ride on The South Downs.

Muddy and not so fast there I guess ?? if so Full Sintered!!

Fibrax's are my fav on CRC.

They do a semi Plus aswell, if you want a inbetween.

I've always used the stock Avid ones, always a fan of OEM pads.

Gonna start using Kool Stop Organic, as that what Stan's recommend for their rotors, but they seem to be fairly hard to obtain!

organic are crap. i normally kill them in one day. sintered are pretty good last ages,havent tried semi metallic

What are the pro's and con's of each pad type?

Sintered lasts longer, but heats up more so can fade on long descents.

Vice Vera on Organic, and Semi kinda inbetween.

Having tried all 3 I'm still unsure about a power difference really.

sintered are good for wet muddy conditions,but produce a bit of heat so not that good for downhill. organic are not to bad but wear quik as feck in the wet.

More into XC / all-day epics so sintered would probably be best for me.

What about semi-metallic? Somewhere in between I imagine?

i expect so but i've never tried semi metallic. i supose you could try them all and see what you think is best. bit expensive to do that though.

TBH I've got to the point that I always use sintered (Fibrax from CRC bulk buy - 4 pairs at a time) and only use organic pads for holidays in warm regions - Alps/Spain etc.

Organic/resin pads don't last long enough to be value for money and aside from heat build up there is no performance difference in my experience. I once went through a set of rear resin pads from new in 15 miles. Not even in particularly filthy conditions either.

Fibrax sintered pads sound like a goer for me. Cheers.

I ran Shimano XTR Resin/Organic pads pads for about a year, never changed them, they never wore out, strange...