With a little bit of searching on Youtube to separate the wheat from the chaff, and you can learn a lot. I just came across
this one yesterday which was pretty good.
I agree that they are fairly similar in terms of what to look for. You can read threads regarding the merits of the
2.7 and
3.2's versus the
2.5's here too. This is a good time of year to be looking since a lot of sellers will be motivated to sell before they have to pay for another winter's worth of storage. Take one of each for a test drive and see how the performance lines up with the market pricing. Please let us know what you think after you have done so!