I find that most of these modern gins are barely gins at all. More like lemon, or cucumber flavored vodka. This is why I like Old Raj. It is an in-your-face gin. Dry, peppery, filled with juniper.
+1 to all of the above. It just doesn't seem like gin gains anything from being really expensive. Its a clear spirit so you can't justify anything in the aging process and its not popular right now so you can't hype it up like some "ultra-premium vodka." Gin is supposed to taste like gin...
Both of the north shore gins (#6 and #11) are pretty good although I don't know if they are readily available outside of chicago.
Tanqueray 10 makes a great martini although I think its wasted on tonic (and other gins work better in that situation). I have not had a bottle in a long time as these days my spirits have moved very slowly compared to the beers but I think I will pick one up when I finish whatever bottle of gin I have now (this stuff...it was cheap on sale and looked interesting...but not really worth it).