On one hand: I've got a PISSPOT full of track days on the stock studs, and aftermarket Gorilla splined lugs. No issues at all, knock wood. That said, see below...
On the other hand: Given the kinds of stresses that the car sees on track days, if you DO decide to replace the studs, the best "deal" out there is FRPP part number M-1104-A, which is a complete replacement assembly for the entire hub, and includes the extended length racing studs. It's just a touch over twice the price of a set of studs, but the bearings in the hub are a known failure (wear=slop) point, so if you're going to do the studs, I would swap the whole assembly out and just start fresh from there. I'm planning on ordering in a set in early June as a PM point. That, a set of M-1107-B rear wheel studs, and four sets of M-1012-G open-end steel lugnuts, and I'll be off to the races, pardon the pun.