As to the clearance/angles comparison of the LC/LX. @TeCKis300 put that to rest for us. LC always wins on approach angle (damn that LX bumper!) but an LX in high will always win on front diff clearance and almost everywhere else (at least for the 2013-15 years).I agree with you about towing. But remember, AHC LX at HI setting is same as LC on stock suspension. So, if the GX550 keeps similar clearances as LC200 then you won’t miss AHC at all.
Definitive guide to LC and LX approach, breakover, and other angles. There's some variation between model years. Here's my attempt to document these details as a reference. Please correct me if you find a source that helps clarifies any of these numbers.
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The LC250 is expected to be 30/25/30 on 33s
The GX550 is spec'd at 26/24/22 on 33s. Not as competitive as I'd have wished, but reportedly easier to mod than the LX (at least that's what they're advertising...