Vaderios, I believe that particular shot is from the AOTC deleted where Obi-Wan has Jango Fett's dart analysed by analysis droids. It was the first special effects scene finished but also the first scene to get cut :P

I agree with Ithilgore, the special efffects of TPM have aged the best. There are some really awful effects in AOTC, but I think part of that is because the shot the film digitally. Everything in AOTC looks too clean and fake. Seems they had that all worked out in ROTS, I think ROTS has great effects. The only thing I think looks truly bad is the Obi-Wan vs Grievous duel. The composition is bad, but the inconsistant backgrounds make it even worse.