I just went through 6-8 months of really looking hard at CRM systems before making my decision. I agree with Jerry and many others, you really need to do your home work, compare, test drive, go to other stores to see it in use and ask a ton of questions. No two dealerships are the same so you got to figure out what is best for you.
I did a lot of research in the forums here and at Driving Sales, including Alex's CRM multi-post on here that is very informative. I talked to vendors who had experience with different CRM’s, that was very helpful. I read Driving Sales vendor ratings, they were valuable, and while there are pros and cons, I looked for patterns that might be reoccurring cons. I did demo’s on about 5-6, then I narrowed it down to 3. Taking tame to demo it not once, but several times within each module and building a bank of questions along the way. I got down to 2 and that is when I brought in our management team and some key sales and service people for demo's. After all, they are the real super users, and you better have their buy-in.
In the end we had a meeting and everyone gave their pros and cons for each. Then we put it to a vote and it was a unanimous decision by all. In the end our team picked the CRM they felt was the best for our store as a whole. They made their decisions based on ease of use, data entry processes, support, etc. I of course was most interested in all of it, most of all it had to be solid and have good support. I wanted a CRM that was focused on the whole store, and we got it.
Its also not about the money, we choose the more expensive CRM in the end because we felt it was the best for our needs. My advice, don’t get caught up in everyone’s recommendations, sure they are good, but you need to do your research, determine your stores needs, demo, ask tons of questions. And let your team be involved.