The Phaser is the predecessor to the Aito. Appararently Sola Models carries them in the UK according to the Donuts Models website.
For any advanced indoor flying, I´d say 6 oz is an absolute maximum weight for a normal sized (32") shockflyer style plane. The large bipes like the Aito does pretty well up to 7 oz, but the lighter the better. A 6 oz Aito has a wingloading of around 1.7 oz/sq ft if my calculations are correct. That allows for extremely slow graceful flight characteristics with maximum time to perform the most advanced manouvres without running out of space in the gym. Any plane (even the big bipes) I´ve seen that´s above 7 oz always looks "stressed" when performing more advanced manouvres indoors. Not at all graceful like the lighter ones.
Here is a link to one of the F3P Expert class flights by the winner in Carvin, Benoit Dierickx. He´s flying an Aito. Apparently he flies it at a higher speed that he would need to, but the low weght really shows in the vertical manouvres. The downlines are really slow compared to the heavier planes. The flight looks a bit rough but remember it´s not easy to fly a full turnaround program indoors in a normal gym.
http://www.rcmania.cz/video/dierickx_f3p.avi
About setups, there is a document where you can see what everybody used in Carvin here:
http://membres.lycos.fr/carvin/caracteristiques1.pdf
The AXI 2204/54 and 2s Etec 450 is quite a popular combination down in France. Now some might say the small Hacker has more power, etc and they would be right, but weight is everything indoors. The AXI has the prop adapter and rear mount built in at 24 grams weight, the Hacker for example would be 10 grams heavier. That´s 6% higher AUW because of the motor alone. Everything adds upp very quickly when setting up an indoor plane, so think weight all the time. But don´t skimp on the servos. Most of the cheap 4 gram servos jitter badly after just a few weeks. The Dymond D47 (don´t know if you guys over in the states have that one) is popular over here and apparently the Blue Bird BMS-306 (Waypoint W-060) was very, very popular in Carvin. Oh and get a light ESC like the CC10.
Pattern guys should be used to saving weight, so you guys should be fine.
/Erik