Actually in that case I would recommend that you do try FO2. Apart from the setting I found it to be very similar to the infinity engine games.
(which kind of bothered me just slightly, because I liked the fresh approach of the first fallout, and for a moment there, FO2, in comparison, seemed to me like, hehe... Baldur's Gate with guns)
It's true, Fallout 2 isn't as combat-focused as Fallout 3, but unlike Fallout 1 you can't finish it without killing someone.
I already finished Fallout and am now rampaging my way through Fallout 2 and I liked both games very much. However I also admit I purchased the Fallout Trilogy to pass the time while the final Fallout 3 DLC come out and am very much looking forward to playing that game again once I finish F2. My honest assesment is you place both originals in too high a pedestal, they are very good games but they aren't as great as you make them sound...but hey I'm glad you like them so much.
I do think some people place them on too high of a pedestal, but I do agree with them that Fallout and Fallout 2 are just better games than Fallout 3. Fallout 3 was a very shallow, hollow experience for me... no challenge... a soulless game world. Essentially what I've come to expect from Bethesda.