So I've had the Tamron 70-180mm F2.8 for about 10 days now and i'm very pleased with the photo results and surprised how versatile it can be. It's sharp enough wide open, light weight (810g), AF seems fast enough and it has the fast (zoom) F2.8 aperture.
It also has a 'macro' mode which can provide about 0.5 life size and whilst not as good as a true macro lens it's good enough for the occasional macro type photo.
All this for about £1.2k UK price and even less imported.
The following images are some of the photos I've taken using it on my Sony A7 III, along with the EXIF info.
180mm, 1/50, F16, ISO 125 (hand held)
80mm, 1/500, F2.8, ISO 125,
180mm, 1/1250, F4.5, ISO 125
180mm, 1/1000, F4.5, ISO 125
180mm, F2.8, 1/1250, ISO 125
80mm, F2.8, 1/50, ISO 1250
Macro mode 70mm, F6.3, 1/160, ISO 160
Macro mode 70mm, F3.2, 1/320, ISO 200
Macro mode 70mm, F13, 1/160, ISO 1250
Macro mode 70mm, F6.3, 1/160, ISO 500
Macro mode 70mm, F6.3, 1/40, ISO 1600
Macro mode 70mm, F3.5, 1/400, ISO 1600
180mm, F3.5, 1/400, ISO 2000
180mm, F4, 1/400, ISO 3200
80mm, F4, 1/20, ISO 1250 (Hand held - IBIS doing well here)