+1....I have both HSR1021c in IMX and GL3, for that you're doing(or me for that matter)the GL3 is great, the IMX isn't worth the extra $$$$

For sidedrifting, if maybe you had the extra $$$ laying around, I'd say sure gor for the IMX or GLX over the GL3....but the GL# works great there also IMHO!
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Bob Barthlow
www.riversnw.com