Yes you can. I have the TDK's and they work great! You also need to purchase the in-line volume to make them work. Without them, the speaker volume comes on. The seem to work on all my Garretts.
Yes, you can buy the adaptor that goes to the AT Pro plug and has a 1/4" female on the other end for about $34 on Ebay. Then could use a 1/4" to 3.5mm adaptor from like Radio Shack for $3-4 to plug in a TDK wireless if needed. It seems alot of peeps will get the adapter so they can use different headphones with the AT Pro.