SS is a great choice. With all its wing area, you can add just about all the weight (within reason)that you want and not upset this plane's flying qualities. It'll fly very slowly and turn without loosing altitude. It'll get you started with aerobatics.

Fly with a big battery, 7 or 8 cell nimh or 2S lipos. Get 900 mah or more so your flight times will be long. I used 2S 1900 lipos for about 20 minutes

If you have the choice of power systems, get the 350. It'll have the 5.66/1 gear ratio which turns a 10x6 prop with authority. You'll be able to fly around at 1/2 throttle for a really long time. I tried the 400 power system and was dissapointed. Performance wasn't as good but it was really good at sucking the power out of my batteries. The 300 works well and is easy on the batteries but doesn't have the punch of the 350. I can't tell you how many times the extra power saved my plane from a crash.

Have lots of fun. Randy