I've been looking at data logger from RPM. I have NOT yet made a purchase..
10 channel expandable, digital and analog channels, can do what you want. $500.
Lots of other options too.
Check out the data logger that Gale Banks has. We run an AEM unit in our lakester right now but my son, and partner and driver, works at Chuckle' Garage and they have used this logger on their record holding pickup and Duke thinks it is pretty neat so we are switching for next year. Banks iDash SuperGauge & DataMonster (52mm Gauge) - Banks