Listen to this person on the knives.Wait, people don't own hobby knives yet? How do you build without them? Here's a tip. Grab this thing.
http://xacto.com/products/cutting-solutions/knives/knives/Z-Series-1-Precision-Knife.aspx
Less than $5 and available at Wal-Mart as well as some major hobby retailers. Also pick up bunch of #11 replacement Z-Blades. That way, you can just toss them out a spoon as they start to dull and you'll never hurt yourself. Best hobby knife I've ever used. Just make sure you get the Z-Series and not the regular stuff. The Z-Series is significantly sharper and easier to use in my experience.
Wings of Light and thruster effects are probably my favorite thing. Shame Bandai doesn't do more of them outside of the RD line. Would definitely import a set of effect parts, even if they were P-Bandai exclusive.
They will cause issues at first as your learn there feel and you will likely cut in the plastic every now and then if your not careful but it will make your kits look ten times better when you clean those nubs