I have both the Onstage type and the typical cast base type, too. I prefer the cast base type for OH's, and you can usually find them pretty cheap new around here.
If you want a bit more weight at the base for miking OH's, just buy a couple 2-5lb freeweight weights. You can slide them down the shaft of the stand and they sit right above the legs, providing more heft. I do this and it works great. I bought some of my freeweights at a rummage sale for 50 cents a piece. The others I was given from old weight sets my friends no longer use.