The newer versions had updated: steering ECU, suspension; Torsen LSD, Daytime running lights, Bluetooth streaming, updated water pump, updated instrument cluster.
You can tell its a newer version by looking at the steering wheel, if it has a blue bottom then its 2010+ with LSD.
Tyres - look for inner wear. A common issue on all variants. Easily fixed by Figs/RR Racing parts.
Brakes - Lexus will charge you an arm and a leg for each axle. Go to Euro Car Parts, Brembo OEM brakes and pads - get them fitted at an indie!
Warranty - if you go for a newer version, even if it doesn't have full Lexus Service History, they will accept it after a check. But, all servicing must be done at Lexus thereafter. IMO it's worth it, £850 or so for 2 years. Had a bit of condensation in my headlights, they covered both lights - parts and labour, easily paid for the warranty.
Other than the advise you've already got, there's not much that goes wrong with these cars.
Good luck!