i have one and love it. the only thing that is really difrent is the banjo bolt. that is the back field strip screw. it is gass through.
PRO's of classic rt:
.....banjo bolt; you can take the valve off the gun with out removing any air line
.....banjo bolt; they leak sometimes and you have 3 more o rings to deal with.
The intellifraim will work on them. just specify when ordering. i have one on my gun and love it. the new z's im not sure. i bet you could order it thow. the only difference is the back field strip screw.
i wouldnt call it a colectors item. i plan to use mine for a while. why change when it keeps up with the angels and other electros on the field
Sorry for the spelling. Im still working on it.