I didn’t see your comment earlier, pretty much all of them support hybrids, old transmissions till 3.01 are exclusions, and that’s because their devs didn’t implement their bencoding library according to BEP, but this flaw was fixed in the new versions awhile.

So you’re loose to choose hybrids (or hell, even v2 only), protocol was around for a couple of years, don’t believe what others’ say, those are the pretty much lazy people with low technical background, who are afraid to upgrade their clients for years. Didn’t catch that “remote” thing, but there could be no way of modifying data bound to sha256 hash.

BitTorrent v2 — is the future. I suppose there’s no need telling its improvements.