Travis Travis Travis! Let me try to help you before you make a mistake...
What are you looking for from your low-end department? What ratio SPL to SQ? Same as the box I designed for you? Like 70 to 30?
Profile makes ok amps, they're nothing great, but they put out rated power. If I were you, I'd email
[email protected] and request a catalog from him. Then get a USX 600F or 800F (600 watts X 1 and 800 watts X 1 respectively) However, you'd have to pay with a money order, so I don't know how that'll work from USA to Canada and vice versa. Otherwise see if you can find a Lanzar OPTI amp on eBay... they are very nice amps, and cheap too... Lanzar's only really good line (some of the Vibe's are decent, but they can't touch the OPTI line).
If you REALLY want some quality, and you want to spend a bit more, go to www.edesignaudio.com and check out the amplifier section. The Tsunami amps are on sale right now, the 1100D is priced at $235 and the 4440 is $165... the former is 1100 watts at 1 ohm, and the latter is 75 watts X 4 @ 4 ohms. I have both of those amps and they are very very very nice.
Now on to subs:
If you want your shit to go "BOOOOOOM" and sound muddy and crappy, but be ridiculously loud, by all means, go with Audiobahn. They are cheap, and get really loud, but have 0 SQ.
From what I hear, those Sony's aren't bad, but I would be willing to wager anything that you can get better for cheaper. Sony has always been overpriced. Check out: www.edesignaudio.com www.adireaudio.com www.respl.com (<--- send those guys an email about their subs, the website isn't up yet).
If you really want some budget subs, get some Pioneers... they make excellent subs that are very cheap.
If you want any other advice, reply, or hit me up PM or email style.