emdzey, the fact is, untill you pass regionals, it doesnt really matter what equipment you choose.
Ive been beat out by people who were running $40 ebay subwoofers before. In kind, I've run DD midranges and three tempests in my car and beat over half my competitors.
whats important for you to do to really get into the competition scene, is to fine tune your ear for staging and phasing. this means major major seat time playing with speaker positioning in the car. when you start to do this (and this can take weeks) red and I can start to help you zero in on stage characteristics, specifically stage instrument positioning, depth, height, the important stuff.
Once you have potential phasing issues dealt with, we can start to do tonality. how the instruments should sound (and this one should be fun, some judges listen for different instrument aspects) on the stage in your car.
Why go with expensive equipment? well, some speaker characteristics can aid in setting up your sound stage. One particular characteristic I am playing with now is the idea that a tweeter with a low FS can enhance, improve the ease of on axis staging. This is almost a non issue in a car anyways, due to the complex accoustics you will experience.
But quite frankly, absolute phasing is the first and more important hurdle to overcome, and its probbaly better to do it with cheap speakers, such as lpg silk tweets, koda midwoofers, and as many subwoofers as your block rocking heart wants (youll naturally decrease these as you get a head for SQ) and slowly pare equipment to the essentials as your tuning ability is honed.
did I mention I spanked the utop car with my DD's and vifa tweets? equipment isnt everything!
and red, I know they are a bit pricey, but have you considered the LRx series rather than the VRx? I think the industrial design of the heatsink blows away the VRx, and that the noise floor in the car, off or not would prevent hearing the difference....