The link you posted says your shopping cart is empty. I run the Race CB on my Savage with out a problem and I have one on the way to put on my MT. I like the Race CB because it is lighter, clutch runs cooler and from what I read on HPI web site is stronger as it is the one they say you have to run if you run a steel spur gear. I run and have no problem with the plastic, which HPI says you can all so run with the Race CB with.

As far as the LST2 and the Revo since I race all out speed does not matter and do not know which is fastest I have never own either but I am around both a good bit and drove both. I much prefer the LST2. All I can say is if I were to buy a new monster truck to race I would get the LST2. If I were going to buy another truck to bash would be another Savage. In my opinion and from the service my Savage has given me compared to what I have seen from others the Savage is the toughest truck made. All so the Savage can be made very competitive on the track. I know more people then not that end up taking the Traxxas engine out of their Traxxas vehicles and putting something else in. There is a reason for this just read this tread and others. All so I do not know many people that keep the stock radio in their Revo as I have heard bad things about them. The LST2 comes with a JR FM radio. In my opinion you buy any Traxxas you have to get read of to much stuff and up grade right of the bat and you end up with a whole lot more money in it then the LST2. I would be more incline to by a Traxxas if they made kits with out the engine and radio. Revo is a good truck just I like others better. One thing about the LST2 parts is not as easy to get as they are for the Revo.

As far as handling I think the LST2 handles as well as the Revo or better from what little driving I have done with both. Being the LST2 is a big block I would think it has more torque.
I am sure if you buy either one you will enjoy whichever one you get.