Dazzy – if you are looking for Maxxis tyres in 26in, I got a few from Bike Discount and Bike Components, both based in Germany. For Maxxis, 3C I think is the one to go for if cash is no object (and you are looking for grip). Dual Compound ones are fine for a rear. Most of those will be EXO protection, but you can get Double Down (which I think are more hard wearing for DH). I don’t have any double down tyres, but I was doing more Alpine Trails then pinging it down the bike park.
I think the old High Rollers in 2.35 used to be a lot thinner (I not measured it accurately ever, but still have a knackered one in the roof that won’t hold air tubeless); Maxxis have changed their measurements I think, so the new HR2 in 2.3 or 2.4 is bigger than the 2.35. I have got some Wide Trail (WT) tyres which come up a bit fatter if fitted on wider rims which they are designed for – although I only run them on not massively wide Stans Flow wheels. I have a Minion DHF 2.5WT 3C and a Minion DHR2 2.4WT 3C. Both a bit less easy to pedal than a HR2, but I think the grip is a bit better.
Maxxis do loads of tyres now, but their website does help you look at the whole range quite easily. Good luck and hope trip planning goes well.