intake brands usually dont matter besides looks and sounds that is as long as your comparing the same style intakes(CAI vs CAI) just a matter of personal preference, but ebay ones may not be as good of quality, but are cheaper.......

and as far as body kits go, try this, look around, google it
http://www.customautotrim.com/bodyki...nda_accord.htm
i found that one in like 10 seconds, as far as resonalbe price goes, how bad do you want a body kit?hehe