I would also like the idea suggested by Curtis of testing a contiguous range of k from the k<10000 pool.
According to
http://www.rieselprime.de/ all below k=4200 are taken by others (teams or individuals), so we might start from there.
Perhaps, we could provide the test files for the sub-megabit ranges too (e.g. starting from n=700k), so that users with slower machines and/or new team members may pick from those files and others may start from n=1M.
This would also give us the chance of finding some primes before they are getting too small for the Top-5000 list...
BTW.: There are also the high weight k's from the 7th drive, we could start with from n=1M.