Although reviewers agree that the BlackBerry is the best value if you want both a PDA and a phone, experts also agree that the Treo 650 is the best choice if you need more memory (23MB), a higher resolution screen (320 x 320), a full QWERTY keypad and an integrated camera. In addition, the Treo comes in GSM and CDMA varieties, so you are not limited to T-Mobile service. Altogether, reviewers say the Treo comes closest to being the perfect marriage between PDA and phone.
