The HB AS GRP which I can get for $115 or the HB AS GPS HS that I could get for $150. I know I'm sounding cheap over $35 but I just dropped $150 on a transducer and hate to get all this money tied up into a unit that I am not in love with. If you guys have any info or experiences please share. If you don't wanna type it, call me 662-588-0996.