I feel as though any quality, heavy-weight gear oil is going to do the job well, and people aren't as intensely loyal as they are to motor oils. I'd suggest a 75W-90 for synthetic, or 80W-90 for dino.
Personally, I prefer synthetic and find the Mobil 1 has a good price point at around $12 a quart. Some people swear by Royal Purple but I'm content with Mobil 1 for all my oil needs.
Ben C - Cary, NC
2001 XV1600A Road Star
2003 XVS650A V Star Classic