hey Nate i just had my vx lowered about a month ago at pedders suspension. i got new springs, rear shocks and some polyurethane bushes put in. pedders charged me $760 including a wheel alignment but i supplied the bushes which cost me $200 from bursons, so i paid nearly $1000 all up. the handling is much better now and steering feel way more responsive. overall i was happy with the service pedders gave me however they didnt make my car sit as low as i wanted it to, when i asked them to lower it i just said lowest legal and expected it to sit really low. when i saw my car after getting it lowered i asked the guy if he was sure it was at lowest legal height and he kept telling me it was and that if they lowered it further it would be unroadworthy. The car dropped a little in height a couple of days after due to the springs wearing in and the car now sits at a nice height but i still want it lower lol.
anyways the point of me telling you this is to learn from my mistake and hopefully help you out so you aren't disappointed like i was. if you decide to get your car lowered at a workshop (i wouldn't recommend doing it yourself) make sure you take them outside and show them how low you want your car to sit. i would also recommend changing the shocks at the same time as the ride quality will be poor if you don't which i learnt the hard way. for shocks i would recommend the bilstein b8's, these are very good shocks but are also very expensive at around $500 for 2 rear shocks and $700 for 2 fronts, you can contact GSL rallysport on the forum about these. one of my mates has these in a lowered vx calais and it handles extremely well and the ride quality is excellent, well worth it i would say.
your looking at around $2k to get your car lowered and get the bilstein b8's. i would also recommend getting some of the bushes changed to polyurethane ones as it will improve handling, you can just ask your local suspension shop about which bushes to replace, they will surely know. the bushes will be and extra $200 or so, superpro or nolathane are both good brands.
i know this is a lot of money but it is worth spending on suspension mods which are often overlooked and will make a massive improvement on the cars performance as opposed to engine mods such as a full exhaust system and other bolt ons which wont really offer too much of an increase in performance or value for money.
and thanks for the tips also very appreciated! 
