Just 1 opinion and there are many I've not listed. I don't like finished bourbon, so no Angel's Envy, Blood Oath, limited releases, etc.
Best under $25: Very Old Barton's Bottled-in-Bond, Wild Turkey 101, Old Forester Signature
Best $25 - $35: Buffalo Trace, Knob Creek, Elijah Craig, Evan Williams BiB, Early Times BiB (L), Old Grand Dad 114, 1792
Best $35 - $50: Weller 12, Elmer T. Lee, Col. E H Taylor, Willett Family Reserve, Bulleit, Old Elk, Wilderness Trail
Best $50 - $70: Old Forester 1910 or 1920, Russell's Reserve Single Barrel, Elijah Craig Cast Strength, Baker's 107, Booker's
Best $70+: If you have the palate and the checkbook to buy in this range do so; if not, don't waste your money. Too many distilleries out there too proud of their product or trying to grab ahold of some of the secondary market pricing. There's too much good bourbon at affordable prices to go unicorn hunting. Everyone hates a tater.