any idea what type of scanner to buy

I need some ideas about buying a scanner handheld



for listening all over the bay area, the alco/coco combined system



someone told i'd need a p-25 type 1-2 tdma scanner



i'm thinking about the one with the 25K channal scanner that amazon has for sale



or should i get one on the new ones that just came out. or should i go to "scannermaster"



thank you guys for your time, have a great week



Darryl Skivers KE6BQG 73's