GOT PRO is something special. I'm not gonna say it blows MET PRO out of the water cause I really like Metallica, but it comes pretty close. However, MET is coming near the end of its production cycle (I believe) and may be hard to get once the decently priced NIBs are gone; GOT should be relatively easy to get for next year or two. So maybe MET now GOT later? But, your buddy has an LE, and if he lives relatively close then I'd just pass on MET altogether. It's great having different pins than a friend.
TZ is a fantastic pin for its time. But it takes a lot of maintenance, and it's a slow flipper next to modern sterns.
TWD is Lyman's best coded pin ever, but the gameplay is painfully brutal. It's a complete double edged sword; drain monster one minute, complete exhilaration the next.
GOT PRO is a gem of all sorts. Speed, flow, fun! The meat of the code is all there rules wise, it's drawback is its sound effects, needs more in a lot of spots. However, it's not a top 10 pin, in fact, it's ranked #94! So it must be a stinker!
Here's how I see it for owning your next pin:
GOT PRO > TZ > TWD PREM > IJ > TWD PRO > GOTLE > MET PRO (only cause your friend has an LE, otherwise I'd put it next to even with GOT PRO).