I'll through in a vote for bilsteins to use with the stock springs. I keep seeing complaints about the stock shocks, but frankly if the cruiser is bone stock and you don't carry heavy loads, they are well dampened. My gripe with them was that once you put 4 people and another 100-200 pounds, the suspension was underdampened. I think the reason that a lot of the guys don't like the stock shocks is that they have added sliders, bull bars, etc, and the extra weight overwhelmes the stock shocks.
The Bilsteins are a little stiffer over small bumps, but seem to have less compression dampining and more rebound dampining on the big stuff. They improve the road feel a bit, but it is not a night and day difference.
As far as OME, I haven't used them, ridden in a vehicle with them, or had any other exposure to them (aside from their lift springs I ran in my pathfinder which were excellent quality). I do believe that matching of compenents is important and if I were to buy their springs would get the shocks valved accordingly. That said, I have to wonder if the OME firm valve shocks would be to firm on a stock LC. There is a big difference in valving requirements for a vehicle that weighs 4800 empty and one that weighs 5800 empty (i.e. Cruiser with 33's, winch, sliders, front and rear bumpers, etc). Shocks that work great on the heavier vehicle would likely be harsh on the lighter one.
If I had to guess, I would say in order of increasing valve firmness, the shocks would be OEM Toyota, Bilstein, and then OME Firm. You have to decide how much ride quality you want to give up, and adjust according to vehicle weight. Just remember, my opinion, is just that, and in this case is nothing more than semi-educated guess.
Cary
96 TLC, BFG's 265, Bilsteins, other than that bone stock. It is pathetic when you get 15mpg for a tank of gas and you feel like you won the lotto.