It does sound like too much roo attention, but you just have to consider your own birds. How old are they now, are they mating? How are the hens doing? If you have bare backs, screaming, violent mating, etc, you'll need to remove a roo. One roo may be so low he never gets to mate, and your flock is pretty healthy. That's why there are rules of thumb for things like this, but not really any hard and fast answers. If things get too hard on your hens, pull one or both of the roos out. I think I'd rather have the two roos in together and the hens without a roo if they've been overmated, that's just my way of seeing it.
Saying you plan to get more hens in the spring, do you mean point of lay or full grown hens, or baby chicks? I've noticed not near as much mating going on during the winter, but the hormones go into overdrive in the spring. If your flock is okay now, and you plan to get baby chicks in the spring, you'll still have to keep a close eye on your hens cause those little babies won't be mature enough to mate for about four months.