I found this spreadsheet while investigating my next set of tires.
Some body did a lot of research on available 18" tire sizes and brands. Probably for a Marauder owner but good data base for us LX'er too.
http://www.neuralimpulse.com/MarauderTireMatrix.xls
A lot of new choices added in the last year for 18". When I bought my 285/18's there was only ONE choice. Now there are 10!