What about an early 210 (not sure on the model designation) with the io470 and struted wings.
Sure it's not a true 210, more like a 182rg really, but you will get about 145kts at a reasonable fuel burn and still seat 6 (maybe not 6 adults).
Probably not ideal for charter but if you are only looking to cart the family about and need the seats it may not be a bad comprimise. Purchase cost would be considerably lower than a later model machine which, depending on your finances may negate the need to line hire it.
I have never operated one so I am not claiming any expertise here, but it may be worth researching. Maybe some on here might be in the know.
PW
PS as for SIDS on single cessnas, my local casa engineering guy (who, believe it or not is a most helpful gentleman) has heard not even a whisper about SIDS coming for any cessna singles but he did suggest talking to cessna direct or any of the cessna owners associations