I'm using
Home | Race-Keeper - the Black unit with their standard high-res GPS and a single windshield-mounted camera, and their OBD-II interface. I haven't yet upgraded to the multi-cam HD export thing or to their Predictive iDash unit to get realtime lap data while out, but both are on my list eventually. RK also logs some other data that doesn't show up in the Youtube videos, like Coolant Temp, MAF readings, etc.
Brake upgrades always help. You *can* run bone-stock brakes at most of these HPDE events running in the first-timer run-group, but you will experience fade and tear up pads. So long as you're aware of it and take it a little easy and/or cut a session short when necessary you can live with it. If it were me though, even for the first event I'd at least upgrade fluid and pads.
Swap your fluid to Motul RBF-600, and upgrade the pads to something that will stand up to the abuse a little better but aren't *too* aggressive. A lot of people like Carbotech with the XP10 front and XP8 rear pads as a decent starter option. They will be a little more "grabby" than you're used to, but you'll get the hang of it when you're bedding them in on the street. Personally I'm now a fan of Carbon Lorraine's pads, which you can order through
Essex - Home page . In those, something like RC-6 front and RC-5E rear works nicely. They're a little less grabby-feeling under light braking, they have nice modulation and release, and they're relatively maintenance free when it comes to bedding/break-in. They're also more expensive, fewer options for purchase than the CT pads, and sometimes take longer to order, etc.
The very next thing on my brakes list would definitely be, as you originally asked, front brake ducts. Stillen's kit is pretty decent and helps a lot, or if you're used to do working on this kind of stuff you could fabricate your own using some quality high-temp aircraft ducting and flanges, etc. The main value in the Stillen kit (over DIY) is they've built nice flanges for the the hot side that bolt to our hubs. While you're in there you could upgrade your brake lines to some stainless ones as well.