As it stands now, I'd go for the T15 if I were you. It seems to get a better reputation as a quality product, and the 468, even for the $600+ you spend on it, still sometimes feels a bit like cheap plastic, depending on what configuration you get, and what upgrades you invest in. Although, one thing to keep in mind if you are like me, is that the T15 is in no way designed to be kind to left-handed players (but then again, most guns are not), whereas the 468 is slightly biased towards left-handed shooters.
*Checks post for typos or errors*
*Finds 42 typos*
"Well, better than the last post!"