Hi, Adam. How are the wheels, looking?
First off, it'd probably be best to uprate the front & rear Anti-roll bars. This will tighten things up nicely.
But if you need that lower look, then ring/email Awesome. They're very helpful, know what they talking about & are currently offering 15% discount to uk-mkiv members. (Don't know about members on here?).
If you do want to lower, then I'd only recommend lowering by about 30mm - Any lower, & the driveshafts might start rubbing. (Unless you uprate the ARB's, of course!)
Also, don't forget a geometry adjustment when you finished all the suspension.