I have been shooting a Parker Ultra Lite 31 for indoors and on a 300 round I have been achieving scores of 295...... if it wasnt for shooter error [:@]I am sure that I could achieve a 300 score.
Now for this winter I will be shooting the Parker Phoenix 34 for indoors, I believe it should do well.
I have a friend shooting a Parker Ultra Lite Pro 38 for indoor shooting perfect round scores with it..... they have since discontinued that paticular model.... but if you happen to find one or ask Parker if they still have any around I think that might be a good one for you to look at. The Pro 38 has a axle to axle of 38" and a brace height of 71/2, with a IBO speed of 306.
Even the Phoenix EZ-Draw looks like it might do well as an Indoor Parker Target Bow... with the 7.75 brace height.....axle to axle of 34, and IBO speed of 285, its a bit slower but I find that to be not a crucial factor for me in an indoor bow.