I have been using a 6" table grinder for my tungsten. Basically, this was how i learned to TIG weld. However, this week i have seen a major difference in my welds when I used a new wheel. So, I am wondering how much money I should invest into a better grinding system? I do not have a ton of money laying around to blow on this. Buy, if there is a HUGE quality improvement then I will need to weigh the pro's on cons.

I am mainly welding 7005 Aluminum Tubing with a Diversion 165. I do not weld a lot of hours in a month. Maybe 15 to 20 hours at best.

What is the best value for tungsten grinding?

Your advise is grearly appreciated