[fdkrew]

PDI hop up uses an AEG barrel so I would not get that based on your setup. I have the same setup as you but with some upgrades and DIY TDC mod. I would highly suggest you buy "Danger Werx Hop Up Arm" and do DIY TDC mod. It alot cheaper and will give you great results.

Here is an example I did:
http://airsoftsniperforum.com/showpost.php?p=39234&postcount=14

DIY TDC Painted:
http://airsoftsniperforum.com/attachment.php?attachmentid=126&d=1336359153