I'm with Lewm on this.
I used to sell ET's and would not put it on this TT - I've heard the Transcriptor at length - a Rega P3 would eat it.
If you want to update the arm I would suggest a Moerch UP4/DP6 - looks would be in keeping with the original and performance improved greatly.
Also the Mayware unipivot Mk4 onward is a good arm, better than the original and in keeping looks wise.