i got my fmic off of ebay. tad bigger than the slowboy, same short route piping AND polished
paid less than $300 shipped ($368 for fmic kit and o2 housing)
slowboy charges $300 just to polish the thing

my friend got a manual boost controller off of ebay for $20 shipped, its doin its job

just be careful and do your homework before you buy anything.
as far as brands, all you're gonna get mostly opinions on that