First it was the Adamo, now it's the Envy. HP has joined Dell in deeply discounting its aging 13-inch ultrathin, though unlike its Round Rock competitor, it hasn't bothered to give it any spec bumps. Consequently, even with this interest-building $450 rebate, the Envy 13 loses out to the Adamo 13 in a straight spec fight -- a 1.6GHz CPU, 3GB of DDR3 RAM and a 5400RPM hard drive are all either slow