I nearly bought an SLX crankset but got the XT just because it was XT and I like you didn’t know much about the SLX, wish I would have got the SLX as 3 of my mates have just bought cranks, etc and say they look better and cost slightly less than XT 🙁
“and the price has been gong up as a result of their popularity”
It’ll be the exchange rate putting the price up. Might just be that the SLX is newer stock, bought at crap yen:pound rates, whereas the XT stock might be a little older, bought at better rates. Look at what’s happened to XT prices at CRC!