Tonearms: Ripoff?

I found this forum interesting because the Audiomods V reviewed here http://www.sixmoons.com/audioreviews/audiomods/4.html is compared to an SME (I didn't catch which one, or not specified).   It was very clear as to the differences and most audiophiles would prefer the SME.  However, it was also noted that improving the internal wiring and the counterweight brought superior results to a stock unit and cartridge matching also provided further enjoyment.  So, the Audiomods V is a very fine and potentially, high end tonearm.  

I was fortunate to purchase an SME IV in 1989 for $1100.  The bearings are not ABEC 3 or 5 supposedly.  It sounds great with a Lyra or Benz cartridge on a VPI TNT VI mod.  The current price is about $4300.  I am not willing to spend a lot more unless I receive a lot more enjoyment from a newer, better arm.  It is also a reliable arm with over 13,000 hours on it.  Well worth the money over time.  I considered an SME V and a Triplanar.  I have an Ultracraft 400c on my VPI 19 for 78 rpm use.  I'm not as fond of the unipivot with variable damping although it appears to work great with a Grado 78 cartridge and minimal damping.

Tom Port of Better Records recommends the Triplanar and uses one.  My SME IV also has great bass, probably not as good as the Triplanar though.

I really like the Thales concept.  Does it have a similar sound as the SME IV or V is the question?   I wonder if the bass is as robust with those narrow arms and more delicate looking rear assembly.  Otherwise, I prefer it to the VPI unipivot arms.

edgewear - I've heard modified Denon 103s sound superb when properly loaded and on a matching tonearm.  It isn't a turd in my friends system.  Perla Audio has an engineer who does a fantastic job modifying the cartridge for a low price.  I've heard it and my friend purchased one (about $500).  What a bargain!