Here's a nice shot of the silver Evo 400 power amp, and one of the black Evo 400 preamp, showing the exterior finishes. I guess these are similar to the older PrimaLuna amps, though I have not seen them.

http://www.g45central.com/posts/PrimaLuna/PL22.jpg
http://www.g45central.com/posts/PrimaLuna/PL16.jpg

On the preamp,the only noticeable change in appearance is the faceplate now has a rounded beveled edge and the selector knob wording shows auxiliary instead of a separately named source input.. I would have preferred an all black colored case instead of the blue.. Also,a lighted indicator position on the volume control knob would have been nice for dark room listening sessions.
whostole-

I was sold on PL 10 years ago. 
HP/VPI with Nordost.

The  PL gear is at a level one can say...okay, let's just listen to music.
I know this is being nit picky but I just wish the PL gear looked better.  I really like the looks of nearly all others - ARC, VAC, Luxman, Octave, Cary etc...I supposed PL is wedded to their aesthetic.
I know what you mean about the looks, especially the rounded cage. However once you see it and feel it in real life, you kind of get a new perspective and respect for the look and feel. It's incredibly heavy for its size, and the finish is very luxurious to the touch. I've come round to it and find it aesthetically very pleasing overall.