I'm upgrading the stock 6TPI blade on my 9" saw. I have cut hickory and red oak with it but am not satisfied with the amount of drift and cutting performance. Short of buying a bigger saw, it sounds like a new blade will help. I will be cutting osage and ipe in small quantities (like 1-2 bow's worth).
Since ipe is especially hard, I was leaning towards a bimetal blade, 3/8" thickness (max my machine allows). SawBlade's website has some reasonably priced bimetal blades in 4, 6, 10, or 14 TPI. Any preferences on those? I'd assume 4 will cut the fastest in soft woods, however, most metal work calls for low speed and high TPI... and my thought process is that hard woods like ipe or osage might require a process that more closely mimics cutting metal? Should I order a 4 and a 10? They're only about $16/ea plus FedEx Ground shipping.