Neumonic

Last year I was given an old bow and it came with Thunderhead T100 BH's..I took my first shot at a deer last fall and missed terribly to the left as I found out later the bow wasn't tuned nor setup for me so even though I was good out to 40 yards with field points, broadheads were terribly off.
I decided not to invest anymore time and money into the 17 year old bow and went ahead and bought a new bow a few weeks back so I could have one setup for me from the get-go.
Shooting yesterday I found out how important a properly setup bow is, those same broadheads that were 12" off to the left are now shooting very close to the field points with no additional tuning after being setup when I bought the new bow!
Now that I have a new setup that I feel is awesome (to me anyway) should I upgrade to new broadheads? I'm sure in 17 years there is a better fixed blade BH out there.

Please let me know what you guys recommend that will fly true and do a great job on white tail.

Thanks!