I have the Longacre Memory. I find the 12 memory spots very helpful. The most helpful readings are done in the middle of a session when you come off the track directly into the hot pits without cool down. Usually a crew member will take the temps quickly and then send you back to the track. Without the memory function someone would need to write down the data which is a bother.
So memory sounds key.
They have one for $299 that has the memory but can't double as a multiple stowatch also. But for an extra $100 that may be beneficial also.
Hmmm... sounds like memory is the way to go though.
Just ordered through Discovery Parts.
Got the deluxe with the stopwatch because it was only $20 more than non-stopwatch version and I couldn't tell if standard had some of the other nice little features.