As you describe the problem, it seems the noise issue you have is based on reports from other repeater users. If that is the case, you don't have a lot of alternatives -- transmitter quality is probably not an issue. If you only use one repeater, or the two repeaters are in the same direction from your home, you could change to a directional antenna (it would look a lot like a UHF TV antenna and might not incur HOA wrath), or use more power. Note, the difference between 10 and 15 watts is negligible ~1.75dBm. So, just changing to a better quality radio is not likely to yield much improvement. On the other hand, if your problem is the received signal at your radio, then changing to a radio with a better quality receiver could make a big difference. As discussed in several threads here, the cheap imports have low quality receivers and that might be your problem. Also, a directional antenna and/or better coax would give you a stronger received signal as well.