Definatly Pikeur, I won't wear any other, sadly Eurostar tend to size smaller so makes me depressed when my usual size on the label is weeny and won't do up!!
Whats your budget? Have tried a couple of the more 'deluxe' brands thanks to ebay and my favourite are the RTS Sportline/Bentex breeches. The full 'leather'seat is made of a stretchy material and they are very comfy/grippy. They are usually around £110 but got some for £68 recently. There are a couple of ebay shops that do them
Agree with you about RTS Bentex, the stretch "leather" seat makes them superb. Watch out though as they do come up small. You can order them direct from RTS in Germany on their online shop, work out much cheaper and mine arrived in week!
Pikeur are also fab, wash and wear well but direct from Germany the RTS are cheaper.