We have a Searcher, but a newer model (2008), so a few differences. The basic layout is a little different too as we have parallel seating at the front, I think a 2005 would have the L-shaped seating?
Personally we prefer the parallel seating, but it is a very personal thing. If you are not sure about it then check out whether there is enough headroom in the front seat, and if there is enough space for 2 to stretch out and watch TV at once (if you like to do that). Check the TV position too.
The kitchen is spacious, the big fridge is excellent. Double bed is a decent size. Our bathroom is different, we have the walk-in shower and no big cupboard, but both styles are good.
Our heating is different, we have the Alde system, which is very good. With the Truma, check the operation/position of the thermostat, sometimes it stops the heating working as it should.
Make sure you see EVERYTHING working in the van before you hand over any money......a friend bought a 2004 model and was assured everything worked, but the fridge had lost its coolant, cost them a fair bit to get it fixed.