I've had a lot of experience installing and selling racks. I hate the anklebiter, i dont consider it secure---look at a car with an anklebiter up there on the freeway and the bike is slanted at angle, i just dont like it. I much prefer the fork type setup. There are reasons for this, but the easiest to explain is that i think it looks cooler. If you want to put the entire bike up there, look at the newest in the yak line the King Cobra or the Cobra. Its a pretty sweet setup (as far as nonfork mount racks go) and can hold bike ranging from the new fisher mtn bike tires (like 28-29 inches or something crazy) down to a kids bike.
Want: 58cm Cervelo Soloist. PM me if you have one to sell Vintage Cervelo: A Resource