Well, I've just been through this process in detail
We have just booked to go back on the 20th of August from Manchester.
We too are renting points from a DVC-er, and staying at Saratoga, Vero and Boardwalk over 14 nights.
TCD were again untouchable in terms of price.
yes there were other flights at around the same price but...
They were indirect
They did not include the car
They did not include pre allocated seats and meals and drinks on board.
We're comfortable with TCD having used them many times in the past, and we got the fly drive for £1600 for the four of us in the end.
We added on 4 14 day WDW tickets to bring the total to £2300 all in
By all means do lots of surfing, i know I did, but TCD again came out the best deal.
Have fun
Craig