I'm planning on getting a multi region Sony 735 and the best price I've seen is from linkonline.co.uk. They use Paragon upgrades.

Has anyone had any particular problems with these upgrades? Apparently they play RCE discs, but how do they compare to techtronic (or any other) upgrades?

I can highly recommend the Paragon upgrades. Link Electronics are helpful and offer very good service. IMHO you can't go wrong if the price is right. Put it this way my next player will most likely be purchased fron Link (www.linkonline.co.uk)