Buffalo Trace is a good choice at a great price. I like to drink any bourbon over a king cube which is a 2" square ice cube that melts slowly and doesn't dilute your bourbon quickly.
You can find the silicone molds out there at houseware dept stores.
All the brands previously mentioned are worthy.
jz
if you like the chill but not the dilution you should try the scotch rocks which are simply impervious stones you keep in the freezer.
I know a couple of " scotch guys" who swear by them, me I never liked them. I'm definately a room temp kind of guy. nothing says bourbon geek like drinking from a glass that looks like a some sort of neanderthal yatzee accident.
Its nice to see a lot of the usual suspects come up with a couple new ones to try. its not fantastically surprising that basil hayden's hasnt shown up. I'm not sure if its the mashbill, but I just dont like that stuff, its by far the least plesant of beams small batch collection.