In my experience, my favourites have included:
Tantus O2 Adam, a nicely sized, pleasantly curved dildo with a softer outer layer of silicone reinforced by a more firm core.
Fun Factory Tiger, a long and rippled shaft with a bit of a curve of its own; very firm and definitely good if you enjoy bumpy texture, but do be warned that it's more than just noticeable.
Tantus Ripple Large, while more of a probe than a dildo, provides the thrusting aspect of a dildo with the graduated 'popping' of anal beads.
There are plenty more, of course. Variety is rarely a problem... Choosing is! Good luck.
I checked out each one suggested. They all look like fun but I was looking for larger dildo's that are typically used for vaginal play but also be used anally. I should have been more specific. I have a Tantus Cisco that is the perfect size (10.75" long and 2.25" in diameter") for me but it has these ridges on it that can be bothersome at times and it doesn't have a suction cup on the bottom.