Power Conditioners/Voltage regularts for 230v

Welcome to Europe! Everything related even remotely to hi-fi cost here at least double than in the US. This apply even for products manufactured here.
From your post I was under the impression that you are looking also for a convertor 110v to 230 volts.
If you do get one please let us know if you get any degradation in sound. I am interested in getting one but I was always concerned about possible degradation.
As far as power conditioning, most people here believe that it does more harm than good; the theory being that with higher voltage the benefits are inferior

Get the Audio Magic Stealth Mini Reference directly from Jerry Ramsey. That would be the lowest cost real solution since your system will sound much better after putting it in.

Assuming you're not looking for a 230/110 voltage down-converter, in Italy locally made Systems And Magic Blacknoise leaps to my mind, the Miniblack comes in at EUR 225,- (in their online shop), but make sure whether it does all the things you want it to do (don't know whether "spikes and overvoltage protection" means surges if the worst comes to the worst)
http://www.systemsandmagic.com/index_file/miniblack_en.htm

Otherwise, there is the HMS Energia Powerbar that has surge protection, they should be on the Italian market, otherwise just order it in Germany (8 outlets, about EUR 400) And then there is PS Audio that is becoming ever more prominent on the European market, the Duet (in Europe 2 outlets only!) comes in at EUR 500, duh!

Dutch made Kemp and English made Isotek are two more serious names with a solid reputation, they offer strips with surge protection, 4 outlets in the EUR 400-500 range.

Welcome to Europe? Guess you're gonna hate that $6 gas and the $800 Xbox 360 et al. Besides, no surge protector, much less one retailing for $500, is going to protect an audio system without degrading its performance.