I am looking for sound decoders for my A-B-B-A HO scale set of locos. Anybody have any ideas? I have several decoders in now but the sound really bad or they will not consist properly. I have a couple of MRC decoders for the 244 engines and a decoder from XL Systems. XL claims to have made MRC decoders for the last 20 years). Any ideas with a reasonable cost?