Is it worth upgrading a Thorens TD125


I Have a Thorens TD 125 TT with an SME 3009 tonearm.
I would like to upgrade it.It is in very good condition.
I would like an excellent midrange, very good base and very good treble.

How do I start?
I am not mechanically minded, so I will have to get someone to do the modifications for me.

Where do I start?
And what will I need?

Tks in advance for your assistance
.
doreen
I suggest posting your question in the Vinyl forums at:

wwww.audioasylum.com

www.audiocircle.com
I, it is was my table, would first find out if a current SME 309 tonearm would fit the same mounting hole as the 3009. Then I would buy a used SME 309 arm to put on the same plinth in place of the 3009 you have now.
You would have an up-to-date TT with a great arm.
The arm used might be expensive.. (new it is $2,000) but your table would be 'HOT!' (nice!)
To the best of my knowledge all SME arms take the same cut out, as do several other arms. I was an SME dealer in past years and in my experience all standard length SMEs will fit.
Here's a Hub thread you must have missed:

http://cgi.audiogon.com/cgi-bin/gallery.pl?blog&1260414740

Note that there's an Audiogon member named Chris who specializes in Thorens upgrades.