I didn't suggest another Mahler besides the 1st and 4th due to the length, but yeah, by all means I would love a recording of 2, 3 or 7 (I really love the 7th - so quirky and fun). The 7th is Mahler's least popular symphony, and quality recordings in the pre digital era are, I believe, relatively scarce. Maybe the Solti/Chicago Symphony (the first performance of the 7th I heard), although some people are allergic to Solti.
I lived in LA for 4 years, and heard Mehta and Giulini as music directors of the LAPO. I have to say - I am not, and never have been a big fan of Mehta's - his conducting seems to me to gloss over many details and lose the overall continuity of a piece in favor of big moments. I heard him conduct Mahler 2 and 4 live, as well as a few other things, and have heard a few other recordings - some of his opera recordings, the Planets, and Dvorak's 8th.
OK - I would happily accept a Mehta conducted Mahler 2, if that's what we get - but PLEASE no Gilbert Kaplan!