If pads aren't comfortable you aren't going to wear them, then what good are they?
I have worn the Roach/RaceFace FR knee/shin pads for the last 2 years. I love them, they stay in place, have saved my knees more times than I can count and are not TOO hot, but realistically pads are going to be hotter than not wearing them - I don't wear them in the hottest weather. Unless its super hot I don't even notice that I am wearing them anymore.
I've heard good things about the newer Fox pads - my wife has a set of them and likes them, though she has to wear cut off socks underneath to prevent chafing.
I got the Roach pads at Pricepoint for $45 a few weeks ago - my old ones STINK, OMG I swear I am creating a new life form in my garage.
John
Pricepoint has Roach shin/knee pads for $40 right now:
http://www.pricepoint.com/detail/13...-Protective-Gear/Roach-Rally-FR-Leg-Armor.htm
They're the same price as those Sette ones that you linked to Greg. I've heard recommendations for the Roach armour (aside from John), but nothing for the Sette stuff.