Personally I wouldn't go with anything other than an OWC drive. Their drives are made specifically for Macs and don't have many of the firmware, compatibility, and slowdown issues present in some of the other brands. I have an OWC 240gb 3G that has been running perfectly since day one (had for almost a year now). No slowdowns, no issues whatsoever. The new 6G versions also happen to be one of the fastest drives out there.
http://barefeats.com/ssd6g.html
http://www.legitreviews.com/article/1635/7/
http://www.storagereview.com/owc_mercury_extreme_pro_6g_ssd_review_240gb
http://barefeats.com/ssd6g.html
http://www.legitreviews.com/article/1635/7/
http://www.storagereview.com/owc_mercury_extreme_pro_6g_ssd_review_240gb