What console?
What difficulty do you play at?
The stock Konami pads work fine if you play on the lower difficulties. Heck, they even work for the higher difficulties for a while, but will eventually be worn out from use.
Almost any soft mat will eventually crap out, depending on how much you use it.
Metal mats are the way to go if you play at high levels. Cobalt Flux mats are the best, but are pricey. I personally got a no-namer off ebay many years ago, and it works wonderfully (though I had to solder the wires shortly after getting it). If you can solder wires, I'd go for one of those.