Brakes, as most things, is a pretty big topic with lots of options. Some forego boosters and utilize a smaller diameter M/C. Some are happy with the standard brakes. I would remind you that vented brakes in and of themselves do not increase braking power. Their advantage is in heat transfer so in that case, you are taking care of the possibility that you might apply your brakes often and heavily as in a track day or going down steep hills.
For the record, I have Banks' vented front disc kit, Banks' rear disc kit, the standard diameter M/C, and dual Lockheed boosters. I don't track or autocross my car but I figured I should upgrade my brakes since my BDA motor was dyno'ed at almost 180 hp at the flywheel.
We've discussed brakes here before so it might be helpful to do a search to see what people have said. Another good source of information is Lotus Central (
http://lotus-europa.com/manuals/). This page has links to a lot of topics and modifications that might be interesting to you - not just brakes.
Lastly, I don't want you to think I'm trying to put you off. We're happy to entertain questions even if they've been asked a few times before!