I had them on my RX as posted above. I have the WT's now on the GX. They do not dampen any noise, wear quickly under your throttle foot, and aren't worth the $ IMO

 

We had the WT on our RX but at the time Lexus didn't have the OEM all weather in brown color. The WT fit like a glove and my wife was very happy with them.
We have the brown OEM all weather on our GX and they are also very nice. I think it will just depend on color match and personal preference to have the Lexus logo on the mats.
Either way you can't go wrong.
By the way, if you do go with WT, if I remember correctly (which may be a stretch), the best price was directly through the WT website.
I bought the all weather Lexus mats online though a Lexus dealer on eBay.

 

I have fitted WT on our GX460 and my 4Runner - no issues with either set and they provide great protection for the carpet in both cars. I had the OEM all weather mats in my 4runner and found the protection they offered to be insufficient.

 

I'll probably end up with a set of the OEM all-weather mats for the front and rear, and a Husky Liner for the cargo area. Haven't ever had much luck with the WeatherTech stuff...

 

My wife's GX 460 has brown carpet. The sales place ordered her some new Lexus Mats and they came in dark grey carpet, not all weather.
Anyone have brown carpet that may have found some matching all weather (Husky or Weather Tech, or other) that come in a matching color?