I think we got the pre-guidelines chair reduced due to new model with the alarms in the isofix and footwell support thing coming out, was around £300 give or take but think the new model was around £400-450, new model looked nicer and slightly different on the ratchet thing and the footwell support bar thing, was a little more user friendly but not enough of a difference to justify extra costs.
It's worth a look at them, I was against the idea but wouldn't go back now to forward facing as my first choice.
Seat in front goes back just enough that I can sit without my knees touching the dashboard of our skoda roomster (im 5'11/6ft) but it's not comfortable on longer journeys for me, I like to stretch out and I'm fidgety lol definitely need to try the seats in the car and your child in there too to see what it's like. My wee man looks far more comfortable in this chair than my daughter did in any of her previous or current ones. If anyone is in Scotland the shop in dunfermline is called little peas, great staff and very happy to show you different seats in store and in your car, the boy there is the main repairer or something of Be Safe chairs in Scotland or so he said. I can't stress the importance of checking the chairs in your own car enough though, regardless of brand etc you need to be able to fit it safely and be able to fit everyone in the car as required. Good luck hunting the perfect chair guys, one of the biggest headaches in parenthood!!
Edit for info my partner (5 ft 1) can fit in the front seat with a changing bag and some shopping in the footwell too just to give an idea of space available in passenger seat. It would be impossible for me to drive with this seat behind me though