The choice really depends use of the car. If you are going to race, track days etc. and want the ultimate in suspension, setup, control etc. then rose jointed suspension is vital. If you're going for a road only and you are not into adjusting and tuning suspension then forget rose jointed suspension. Alternatively you can have a little of both. Rose joints are quite expensive and wear out over time. In fact if you don't keep em clean they'll wear out fast.
I'd recommend you buy some books on suspension and read up on the theory, you'll get a much better idea of which way you want to go.
Regards,
J.P