compromises
Assuming your racing is not of the hard-core, no-expense-spared variety, you probably cruise your boat as much or more than you race it, so the roller up front makes sense in terms of convenience. There are a lot of folks who have the same set-up, but want to get the most out of their boat as it is, without making big or expensive rig changes. You can de-power by flattening the main, dropping the traveler, twisting off the main, reefing the main, and reefing the genoa, preferably in that order. If you are not racing in a spinnaker class, you will find that as soon as you make the turn downwind, the 150 will be necessary to hang with the competition in anything under 20 kts of wind. Upwind, its shape will be compromised by reefing, but at that point you don't have many other options (assuming you have gone through the above steps) and will just be keeping the boat balanced and controllable as you sail upwind legs. Your competition will be in the same shape, and you will be less interested in ultimate pointing, etc., than in just keeping the boat moving at decent speed and under control. Sometimes, just a couple of rolls in the genoa really settles the boat down. If the wind is gusty, it really helps to be pro-active and sail her up a little just before the gust hits (taking a "bite" to windward, then easing her off to catch the backside of the gust and ride it to increase boatspeed. Most casual racers with less than optimum set-ups tend to carry too much sail for too long - it doesn't gain you any speed upwind, and each round-up hurts your time. If you do roll the genoa in, be sure to move leads forward, as Alchemist said.