Ah, a topic I'm familiar with having preached several and attended many more. Sounds like the black suit is the right approach. Trust me, no one will notice what you're wearing unless it's inappropriate (see "Tie, Looney Tunes" above). The main thing to remember with funeral attire is dress conservatively, respectfully and so as not to call attention to yourself. If in doubt, always go black (except for your shirt, of course.). I've thought I need to pick up a black grenadine for funerals. I don't have a good black tie. The timing is bad (the timing is always bad), but the first funeral I ever preached was on a Christmas Eve for a woman I didn't know and had never met. There were only about a dozen people at the funeral. My condolences to the family and loved ones.