Rose bikes XT with Facebook discount.
The Deore are good and the SLX are very similar to the XT. The pad pin, forged lever and free stroke are only subtle additions but I quite like them. You can put a threaded pin into the SLX callipers but why faff when you could just get them right first time?
I think I paid £140 for XT non-icetech but aluminium backed pads with SLX 6 bolt rotors using the above, so the same as your projected amount. I think it’s only about £10 more than SLX.
Very stoppy! They bite immediately with lots of power as with the current SLX, which takes some getting used to as they’re sharper than the previous SLX & XT. The new Deore feel very similar to the previous SLX & XT.