We had a 407sw 136 as a personal car. Looks good, handles very well (hard ride compared to 406), good gearchange, loved the glass roof

, bit tight with 2 Terv's and a Flatcoat in the back even with the rear seat down not much extra room for anything else, great fuel economy unless I gave it a bit of, erm, welly
Wouldn't have one as a Taxi unless someone else owned it. You can't afford to taxi a car that does less than 20k - 30k per clutch. The thing most non cabby types forget is that 95% give or take of driving is stop start, up and down through the gears driving, averaging 18 to 22 mph on a good day (at between 35 to 42 mpg in the 406 depending on day of the week, day shift or night shift etc). On a busy shift the driver will depress the clutch pedal many, many hundreds of times as my knee, back and sundry other bits can testify...
All the 407's that were cabbying around Lincoln except one are gone, and remember there're about 400 private hire cars (excluding minibuses) and outside city LA saloon HC's (city is a limited plate black cab only HC area) for a city and surrounding satellite villages of no more than 90,000 peeps. There are no 607's.
If I could get a 607 with all the trimmings, without that engine/clutch/gearbox that's gone in the 407 and without a FAP. I'd go for it. But it's getting the right engine (and clutch) that will present the problem Soops not the bod and trimmings.
I'm no fan of the Superb, Octavia or 307sw/308sw but they the Passat and Avensis (this because Cab Direct were doing a special deal a while back I think) are gradually displacing all other cars.
Wish I could be more upbeat but total cost of ownership must be a factor as well as driver comfort and esteem.
52 HDI(90) 406 saloon. Sadly no longer owned, bless her she got near 200,000 miles and I had to sell her on, she was still going strong.
Airfix test pilot and part time formula 1 driver for scalextrix