If you take out the fact of all the issues the phone is having yes it is going to be an awesome phone, otherwise it is going to be another pre-released phone that has issues straight out of the box and wont be fixed for a while (Samsung is notorious for this...) . Read around about it, its not all hyped up to be what you think. The HTC rezound has similar specs as the nexus without the bugs and it was released a month ago so whats that say about its current hardware??
As far as D3 vs D4 goes... If you want a droid razr with a keyboard go for the D4. If you want a more original 'droid' without 4g and a better keyboard go with the D3. Both have similar spec but the razr has a little better/faster chipset (omap4430 vs omap4460) And like you said, there is no removable battery which I can see being very frustrating since I'm a modder and i need to pull my battery quite often. Its all really personal preference in your case, since you will be using your phone AS A PHONE lol.. The speed difference wont be noticeable to you IMO and they both run android (and blur) so the features are identical. The D4 will probably ship with androids current version 4.0 (ice cream sandwich) while the droid 3 is currently on android 2.3.X (gingerbread) but will be updated to 4.0 hopefully in the near future.