The H9 Ultimate was the first electric foamy for me. On the advise of one of our club members, who is an electric "guru", I chose the following set up:
Himax 2015-4100 with the D gear (the C gearing works great too) and an E-flite 12x6 SF prop. I used a CC Phoenix 25 esc and a TP 1320 3-cell li-po batt. This set up worked great and had power to spare.

Part of the reasoning behind this set up is that it is also a good combination for other 3D planes which is a good thing to keep in mind when purchasing any gear. If you're looking for an outrunner set up, a Himax 2812-0850 with either a APC 10x3.98 or APC 11x4.7 prop will work great too with the same esc and batt. Both Himax motors are "stick mount" and fits right in to the nose set up on the Ultimate. A hacker A20-20L would also be dynamite on this plane although you would have to modify the mounting on the plane.

As far as tips, keep it in the air as it doesn't handle too much abuse. The lower wing is mounted very close to the bottom of the fuse and this is one of its weak areas. You will find that you will be repairing both the front and back of the fuse under the wing cut out. A little strip of 1/16" balsa on each side of the fuse in both locations will help.

When banking right or left using ailerons - get ready for rudder input as well. The 3mm foam control surfaces flex alot and this is part of the reason you will have to use rudder in turns.

All in all it is a neat little bipe to start with. When you're ready for a more "serious" 3D foamy bipe, check out our 6mm depron Double Trouble. It is in a similar size/price range and you can use the same gear mentioned above.

Good luck!