Depends what they supply. If you know what fluids you want then it can be a much cheaper option as all you will be paying the mechanic for is labour. Absolutely get the turbo oil supply screen removed and checked/replaced. If you carry out regular servicing don't believe all the hype that surrounds it as if it is serviced regularly it will be fine. At 55k kms I would reckon, as long as it has been looked after, that the majority of the suspension components should be fine. But, well worth checking none the less. As a mechanic by trade, drop me a PM and I'll give you a list of things that I personally would check.