I would go with the Eight 2.0. Lots of hop ups and there is more of a chance when you go to a club race and you need something for the car that you don't have someone there will, with the 810 not very likely. Parts are not hard to come by, and a lot of guys out there run this car so set up advise is bountiful.
From what i hear the 810 is a great basher but not track friendly(at least in my area). Just go to your local track that you will run at and see what the other guys are running and what parts are in stock at the local hobby shop.