I use a unication G5, for all my WSP channels. Works like a charm, excellent decoding, no external antennas whatsoever, in the car or in the house.
You would want the 800/VHF unit which right now can be had at several dealers for around the $650 figure.
I used code3 supply out of Albuquerque and they are great to work with. I know they're a little more money, but if you take off all of the expenses for antennas, coax, and pieces and parts, not to mention the countless hours it'll take you to try to get a scanner to work, I think the 650 puts a guy money ahead as this thing is phenomenal right out of the box. A bit of a learning curve to program it but no different then the scatter programs. Also bear in mind that the p25 phase2 firmware upgrade is still a couple months out.