I did a lot of research into which SSD I should buy, almost everything I have learned can be found in this long article
http://www.anandtech.com/storage/showdoc.aspx?i=3631
Here's the Readers' Digest version of what I took away from the article (Others can correct me if they disagree). For the best cost to benefit ratio I was only considering OCZ Vertex (just my preferred Indilinx controller), or Intel X-25M G2. The OCZ blows the Intel out of the water on Sequential Read/Write, while the Intel blows the OCZ out of the water on Random Read/Write (Particularly 4K Write). I also believe that the OCZ vertex does a bit better as it ages, but maybe not by all that much, and testing this seems to be quite a crap shoot anyway.
Another thing to think about, is how much data you think you will be using the drive. You'll see performance hits once you fill the drive, so it seems like a good idea to buy a larger drive than you need so that you can spread the data around a bit.
For what it's worth, I'm currently using an OCZ Vertex 120GB in my Macbook 2,1 (perhaps stupid as I am probably saturating the SATA 1.5 controller in some cases) and I've been happy with it. I just ordered a Macbook Pro and an Intel X-25M 160GB to put in it. I decided to go this new route because it seems to be a bit better balanced across the sequential/random, small/large, read/write spectrum. Also I was looking to get something bigger than 120GB and the OCZ Vertex 250GB drive was a bit pricey for my tastes.
Ultimately I think you'd do well with either of these drives, and in the real world I imagine you would be hard pressed to tell the difference between the two. You could also go with one of the other brands that uses the Indilinx controller (OCZ Agility, Patriot Torqx, Supertalent Ultradrive, and I think there might be one or two more that don't come to mind).
Hope that was fairly clear and helpful. Post back about what you get and how like it.
EDIT: Forgot to mention that there are nice benchmark scores on pages 21 and 22 of the linked article if you want to skip all the stuff explaining how SSDs work and etc. Although I found it quite interesting.