I would go for the Redbay, I currently have a 1999 9.1 fitted with 2 Yamaha 165hp inboards and its a great set up. Mine is fitted with the canopy and it offers enough protection not to be bother with the weather, which in the west of Scotland is usually raining.
I have done about 180 hours this year in all weathers and never had any concerns with the boat, I take it you have been and seen the building of the boats?, the last time I was there Tom (the owner) was sanding and polishing the Gel on a new boat and the fact that the owner still has this much input into his boats to me is a good thing.
What I really like about the bigger Redbays is the Hard nose, you can just charge on with out any fear of the tubes parting i.e I have been out in a F9-11 (Gusting) and didn't need to back off from about 30 knots all the way.
Go out and try one around the Mull or Rathlin in a Wind/Tide situation and youll see what I mean
As for the Parkers I cant really comment as I haven't seen one, but I do know that their main dealer tried to buy my last Redbay prior to becoming the main dealer
P.S would I sell it? only if a 11m came along