Val works, I had one in the Aerobat when I bought it. Replaced it when I got a chance. Like Dan says, they have an archaic design. I saw a new Val comm radio at Sun N Fun last year that was very impressive, only an inch tall, and designed just like the Icom and King, flip flop etc. As far as I know they aren't on the market yet. According to the Val website they are "coming in Summer of 2008" Check out the brochure.
http://www.valavionics.com/productPages/comms/COM%202000%20Brochure%2005-08.pdf
A little high on the price, but in other ways they seem like a good match for the limited radio space in a 150-152.