As for a thermometer: the Flukes look most professional, but if you don't care for that you could go for cheaper ones. I have this Voltcraft K102 with two ports for probes and cost me less than 60€. Works perfectly. Flukes will go for 100€ or more.
I think for Vantage you're better off without the SR-2. GT1 is so badly limited by raw CPU MHz that you need 6G+ for sure ... something that the SR-2 cannot do right now (due to locked CPUs)
I guess you're the fastest non-sponsored in Vantage.
I was looking for you in the top-20, but couldn't find you. Time to focus on the benches you don't have a lot of points for yet!