i think you should go in for a dual sim chinese phone if that contains opera mini (if such a thing is available, no idea if it is).
the thing is, the browsing experience on your 2323 opera mini will be "much" better than the ones you will get with wap browsers on the likes of micromax Q1 (which i suppose isnt dual sim) and the spice qt44 (which is available for 1675 on ebay).
if you want something similar to 2323 in terms of browsing experience, avoid these. look for something with opera mini (i am suggesting chinese as these will be as i think the only ones available given your pricepoint)
if browsing experience is not paramount, and just basic access to things like gmail, fb, chat on gmail/yahoo, news, weather etc. is what you are looking for, the qt44 gets by fine. (i have checked it - set up gprs easily with pre-set Idea/Airtel settings, and opened m.facebook, m.gmail, nimbuzz -googlechat/ fbchat (its not program, but web based), m.cricinfo, weather, news (both preset bookmarks) etc.. again, to repeat, the wap browser experience was strictly basic, not as good as one would get on opera mini.
PS: spice qt44 is qwerty, which i think you dont want. i just took the example to make a point on the browser differences, which i think is crucial between the nokia 2323 (which has a great browser - opera mini) and others which might not have it.