Best coin mechs for a Big Red?

The stock HAPP coin mechs all tend to jam sooner-than-later and it's very annoying. Was wondering if there was a better brand or something I could buy that would fit? Thanks.

edit:

Anyone know about the Imonex V9 Series Coin Mech seen here?

http://www.lizardlick.com//pages/coin_doors_parts.shtml

It sounds great, but would it be completely interchangeable with the Happ Coin Mech?

the v9 mechs work alright after you adjust the coin opening that's what we used at the last place i worked for the only way they ever go bad is if they get smashed. as for dirt they get dirty just like any other mech. Can be cleaned with windex also they are interchangable just pull off the tabs on the sides to suit your coin door hardware with pliers