overkill is a much more advance tune. if you can get ahold of him, and feel like waiting. he has the better tunes. hes new pcms are unlocked.
reptile has even said, out of all the caned tunes that he has seen, wills is by far the best.
BUT yes like you said, hes not always easy to get ahold of. if you send a couple of emails a day for a few days he usally writes back pretty soon (says his email is messed up and sometimes he dont get them) if there is anything you dont like, you can send the pcm back with in 30 days for a free retune.
BUT agian, custome tunes will get you alot further than these caned tunes
