Mat advice, please!

I've fallen off my pole a few times but, thankfully, never badly. Recently, I tried to do a kickslide, totally forgot to hold on to the pole (I still don't know how I managed that!!) and landed flat on my back. Didn't hurt much and I can laugh now but it was a not-so-gentle reminder of how klutzy I can be - it's probably only a matter of time before I do something silly and end up in pain. So I'm looking at mats. I'm in the UK so I believe Pole-O-Mat is my best choice? I was wondering if anyone's used one and whether you'd recommend the 2" or the 6" thick version? I'm learning hip holds just now and though I'm starting quite near the ground, it'd be reassuring to know that if I did drop, my head would be less likely to snap off/burst on landing. I'd rather not pay the premium for the thicker mat if the thin one will do but - equally - if the thick one would be more appropriate, I don't mind forking out for it. Rather that than accidentally putting myself out of action for a while! Any suggestions? Or just thoughts on different mats you've used/mats in general?