I would say that if you are a new flier, the recommendations you have gotten are wrong. The TwinStar is designed for a .25 and flies well with a .25 or .32. With 2 OS .46FXs, it will be over powered, which can get you into trouble when you lose an engine; it will be nose heavy, making it heavier after you balance it, the tanks are only about 3.5 ounces so you'll have a short flight time, The clearance requires you to use a 3-blade prop-more costly and header to find. An expert will be able to handle it, but if you are new, you won't be able to. Two .40LAs, by the way, are the same as 2 ball bearing .32s for power. Several of us in my club have TwinStars with either OS .25s or GMS .32s and they fly great.

For 2 .46s, you need something like a Cedar Hobbies Twin Stick, a larger plane that was designed for 2 .40-.52 engines. [link=http://www.cedarhobbies.net/index.php?id=product_desc&product=5]Twin Stick[/link]. I fly mine with GMS .47s and it flies great. Easy to land and does all the acro except 3D. It also handles a single engine well. And, it flies like a Stick, which I know you can handle.

You also need to check in to the RCU Twins Forum and talk to the people there.