I need some floor mats, front and rear, and also rear cargo mat for my 2000 D2.
I see I can get genuine LR mats or I also see I can get aftermarket ones such as WeatherTech.
The LR mats seem pricey, but of course they should fit the best.

I want a good fit and something heavy that is not going to slide around or move.

What should I get and where can I get it?
Any pros/cons to aftermarket versions?
What are the board members using?

WeatherTech hands down, I have them and they not only fit great but they are very durable.
The floor in my cargo area looks brand new.

WeatherTech hands down??? Wow, those must be some good mats. Are they heavier than LR mats for a 2000 D2?

I use the weather tech ones in my Audi, been great. STill need to order a Set for the rover.

Are the Weathertech's a exact fit? Looked to me like it's their generic fit ones to me.

Yeah, if you look at photos of the stock mats vs. the WeatherTech, it appears they are a different cut.

The WeatherTech floor mats are a direct fit.
My truck came with them so I cannot compare them to the OEM ones.

I just bought them and was hoping they fit a little better. If you have the carpet floormat in your footwell you will see how it fits about perfectly. But the WeatherTech leaves about 2 inch gap on one side. Not perfect but, good. I wish they fit like the WeatherTech floor liners, but they do not make that option for our years. Sucks. So this is our best option, wished they fit a little wider.

I assume that you are not interested in carpet mats - but if you are - I have the Lloyd Mats from this place (front, rear and cargo):
2003 Land Rover Discovery Floor Mats

perfect fit and good quality

If you want carpeted floor mats go to a carpet store and buy some scrap remnants, cut to size and away you go.
I got tan to match the wifes car's interior, cost me $15 for 4.

In my truck I prefer the WeatherTech type because they hold mud and water to be dumped out on the ground and not let get soaked into the trucks carpet.