I went with the Kenwood TM-V71A myself, because the faceplate buttons were backlit and I found it easier to change settings without the software. It's not entry level though, mine has two independent radios. Came in handy when I got sucked into playing APRS by one of my Tacoma buddies, as that uses one radio just for the data. For entry level though, I'd second Paul's recommendation of the Yaesu 2900.
Radio aside, my radio body is mounted in almost the exact same spot as Paul's, under the passenger seat behind the RF amp. I did cut out a bit of the sound dampening material to make it easier to mount. My faceplate is mounted above the rearview mirror -- I didn't like having to take my eyes off the road when it was down under the 4wd selector.
For a mount, I used a NMO hatch mount, on the drivers side of the rear lift gate. I can't remember if that was the same Diamond one as Paul mentions, or if it was a Comet. For antennas, I have two, a Comet SSB-1 rubber duck that I kept on all the time before I lifted the truck, as it allowed me to drive in the garage without removing the antenna. My second antenna is a Diamond NR770HB 1/5 wave foldover that I like using when I'm on the trail. Both are great antennas that I would buy again in a heartbeat...my SSB-1 may be small, but I was able to listen to the Keller Peak repeater (near Arrowbear) one night all the way down to about where the 261 and 241 split off from each other on the way to OC -- that's like 50 miles!
I have a write-up of my install on TheNewX, but I'm also not far from you Oz if you needed any help or wanted to see how I set everything up.
I like to shop online at Universal Radio, but when I need to actually look at something, I head down to HRO in Anaheim. Just make sure you give yourself plenty of time though, cause those HRO guys will talk your ear off -- in a nice, friendly way. :-)