I know there are a bunch of posts about this, but I want to know who thinks what about the Upsolute chip 'vs' the Powerchip 93 for the crossfire. Please let me know any opinions/problems/results...

Both claim 215->236hp and 229->251tq

Upsolute - $425 installed.
Pros: Reasonable price, 2 hour turn-around, Rene verified that it's optimized for 93 octane, have yet to really see someone with a problem, have been very responsive to my emails/questions, based in Austria and have lots of experience tuning MB.
Cons: Installed by someone as a side job, have not seen verified results from a dyno.

Powerchip 93 - $695.
Pros: Seem to be a decent company from their brochure, also optimized for 93 octane, received a dyno sheet showing true gains on the crossfire for the 91 chip.
Cons: Price is higher, have to mail my ECU to them and get it sent back, have not been as responsive.

....and go.