I would like to change out the amber. For me it would depend on the value of the group buy. For a few bucks I would still wait, but if the discount was more then I would buy sooner than I planned.
When I was doing the SUV thing, the site I was on had group buys and the discounts were tiered by how many people paid the downpayment to buy. The more that came in, the cheaper the price for everyone.
I've already swapped the front lights for lits and would like to put clears on the rear. I will probably do it one day but if we can get a good deal on a group buy, I might be interested sooner rather than later.