I dont think that you should regret the decision you made... The Defy+ just has 200MHz faster processor than Defy and has 1700mAh Battery and comes with Gingerbread out of the BOX other than that Defy and Defy+ are pretty similar specs wise... If you want you can overclock the Defy's processor too to 1GHz and if you want Gingerbread OS then you can install CM7 and if you need more battery life just wait for the Defy+ to get released in India once it gets released just buy its battery and put it in your defy... i dont think that the Defy+'s battery wont work in Defy...
TBH you bought a great phone
hyeah:
Cheers!!!