Rear End Set-up Advice

[Skylark]

I've finally gotten an opportunity to throw some more money into my car and it's time to address the rear-end. I'm running BMR control arms up front with 400lb QA1 coilovers and Wilwood twin piston calipers on stock-size rotors.

What are your opinions on mixing and matching product brands? What is better, boxed or tubular rear control arms? Price is pushing me toward the UMI product...OCD is pushing me toward the BMR. Will the Rear BMR sway bar bolt right up to the UMI tubular control arms, or is some fabrication required? <----(not an option)

Below are the parts I'm considering:

BMR Boxed lower control arms poly bushings (pb): $219
UMI tubular lower control arms pb: $159
BMR 1" lowering springs: $139
BMR front and rear sway bars: $288
Right Stuff rear disc conversion: $479

I've got about an $800 budget....what would ya'll do? This is a daily driver btw....