The ZF auto came out mid 07 as you say. The one with no name is the standard car, with 18 inch wheels. The executive was the luxury model with things like rear picnic tables, and 19 inch where's. The sport GT is the better pick, with a sportier ride and 20 inch wheels. Then top of the tree is the GTS, which is sportier still with lowered and fixed rate suspension.
All have flappy paddles so you change gear if you want to, but the ZF box does a good job anyway.
Can't remember when Bluetooth came in, but you could be right in saying it was part of the 2009 changes.
Tyres only last 10k as it is a heavy car. £1k per set. Similar with brakes, at £1k for new fronts, and another £1k for rears. (Though the brakes will last longer than the tyres). Also budget on £1k per year for standard servicing. But if you go for a ZF car from 2007 onwards, at least you don't have the replacement clutch (of circa £2k) that the earlier DS models need every 30k miles (approximately). On earlier, higher mileage cars, also expect to replace the shocks (especially rears), at a costly £1.5k for the parts alone. And check the front sub-frame, as that is prone to rust.
As an all rounder, the pick of the bunch is an 07/08 Sport GT. Expect to pay about the £20k mark approx, depending on condition/mileage.