Here are my quick thoughts on this. Just remember that prices can vary depending on market and taste is subjective.
Under $20
*Rittenhouse BIB (rye whiskey - 100pf)
*Weller Special Reserve (wheated bourbon - 90pf)
Very Old Barton BIB (rye bourbon - 100pf - limited distribution of the BIB version)
$20 - $30
*Old Weller Antique (wheated bourbon - 107pf)
Weller 12 (wheated bourbon - 90pf - 12 years)
Four Roses Small Batch (rye bourbon)
*Buffalo Trace (rye bourbon)
Elijah Craig 12 (rye bourbon - 12 years) - I'm not a huge fan of this one, but many people consider it to be very good
Elmer T. Lee (rye bourbon)
*Old Grand Dad 114 (rye bourbon - 114 pf) - the only Beam product worth buying, in my opinion...I've had some decent Bookers, but that's also a higher price point.
Sazerac (rye whiskey)
$30 - $50
Old Rip Van Winkle 10/107 (wheated bourbon - good if you can find it...usually overpriced)
Rock Hill Farms (rye bourbon - 100pf) - I enjoy this one, but it can vary, since it's a single barrel. Also a little expensive for what you get.
Wild Turkey Rare Breed (rye bourbon)
*Four Roses Single Barrel (rye bourbon - OBSV recipe)
$50+ - all of these are limited or yearly releases
*Four Roses Limited Edition Small Batch (rye bourbon) - usually excellent.
*Van Winkle Family Reserve Rye (rye whiskey) - hard to find but very good...the only Van Winkle that I would actually look for
*Buffalo Trace Antique Collection (George T. Stagg, William Larue Weller, Sazerac 18, Eagle Rare 17, Thomas H. Handy) - the only one that I look for is the William Larue Weller. Second and third choice are Stagg and Saz 18. Handy is good, but overpriced for youngish rye whiskey.
*Parker Heritage Collection - I didn't find this years to be particularly good, but some people have said it's one of their favorite whiskeys of all time. Even though I didn't like it, this is a top class yearly release.
I'm sure there are others that I am forgetting.