Over the past few weeks I've been doing a lot of reading, mainly on aquariumadvice.com and aquaticplantcentral.com trying to take it all in. Here is the equipment I decided upon and have or have on order. Critique away, and don't hold back, I can take it

20 gallon high tank, measures 24x12x18
Aquaclear 50 hang on back filter - although I'm looking already for an XP1
Visi-therm Stealth 100W heater
Satellite 24" 1x65 PC light with dual daylight 6700k/10000k bulb
DIY dual 2liter bottle CO2 with a glass diffuser (will inject into the XP1 if I get it, also have sweetwater stones on hand as well)
Eco-Complete substrate (40pounds)
planting tools: forceps, scissors, etc
My water tests out at gH of 5 and kH of 6. I haven't yet really decided on what plants to start with, but witnessing the monthly auction yesterday gave me some great ideas.
For ferts I've got on order from Greg Watson:
KNO3
KH2PO4
K2SO4
CSM+B
So, critique away with all your might. What have I forgotten, what should I change, what do you like, don't like, etc etc.
Thank you!