It will be interesting to see the Empulse specs which are due out in just a couple of days.
I put my name on the reservation list for an Empulse when Brammo first unveiled it a couple of years ago, but in January, after waiting for almost two years, I bought a Zero ZF9 instead. I have over 2,000 miles on it now and I love the ZF9. My only criticism is the exaggerated range claims (count on about 50% of what is advertised), but to be fair - all EV companies advertise the "best case scenario" range. For the Zero they claim 114 miles/charge, but this is at an average speed of 20 MPH (see the post, 'Real World Range' for more info).
If you get the Zero I highly recommend getting the optional "high speed" charger, which will charge the bike in about 4 hours, vs. overnight. I used it last weekend for a longer ride and found that I could add about two 'bars' on the fuel gauge for 45 minutes of charging; not bad.
When I bought my bike there was no negotiating - so if you can get a break on the price - so much the better. In any case you won't regret riding an electric bike; no gas, low maintenance... and you are helping the economy, the environment... and enjoying the commute!
One last thought - I got my $900 rebate from California, but at no time during the application process was I asked to "keep the bike for three years". I never signed anything to that affect nor agreed to anything like that, so I'm not sure where that idea came from.