Has anyone ever regretted their choices for paint/carpet?

Well, today we went to some carpet places and we've pretty much decided on Nylon twist pile in a nice light fawn/pale-ish cool brown colour.

I originally had my heart set on plush pile, but it's SO expensive (upwards of $70 per square metre) and also it's so soft it's really TOO soft for what we want. We want heavy duty cause (a) we've got a heap of very heavy furniture and they'd leave indentations forever, (b) we'll have a new kitten who may have accidents or just cause stains or general marks and they'd all show up, and (c) every foot mark, scuff mark, etc would be very obvious...

So the Nylon twist pile isn't quite as soft or completely even/plush-like, but it still has that "sea of carpet" effect, and is MUCH harder wearing, and is only $46 per square metre. (this is at Carpet Choice)

Any opinions?

Um...what does that mean? lol Specs of what? The carpet? It's just nylon twist!! I don't know anything more than that, I'm afraid!

Oh, I see, yes.

I'm not sure what to look out for...I'm not entirely trusting of carpet salesmen, so...

As far as I know, this is what I'm aware of in terms of wise choices...

1. Durability (not too soft or high a pile)
2. Colour fastness (apparently plain Nylon fades quicker than that other type of Nylon I've read about on carpet supplier websites)
3. Looseness of pile, like if you push down or separate the tufts, if there're big gaps, that's not good. Tight piles/tufts are good apparently.
4. General appearance. I want a soft plush look but long term wearability.

I don't know...what else is there?