With mine it was just the quantity of little jobs that surprised me, rather than anything major. You want to be having a good dig around the wiring loom in the engine bay and pull back the carpets in the foot well and boot to expose it - avoid any with bodged wiring jobs.
For 2k you're looking at the 2.4 jtd, the TS rather than the JTS and the 2.5 v6.
Ignore the diesel, it's a pretty decent engine by diesel standards, but who wants a diesel alfa. The TS engines are reasonably good, the newer JTS ones were direct injected so a bit better but as above they're probably out of budget for a nice one. The 1.6 and 1.8 are probably a bit slow, the 2.0 isn't too bad though. Makes a nice noise for a 4 pot and has variable timing. The timing belt intervals on the TS were revised to 36k - make sure it's been done on schedule and there's no dieselish rattle which would be the cam variator.
The 2.5 v6 is pretty similar to the 3.0 lump in the GTA and it's the one you want - it sounds glorious and is just....right in these cars.
Handling is pretty good, very good feedback and reasonable grip, feels quite attached and lively. They could ride better though.
If you want the best car for your money then look elsewhere, if you're buying one because they seem like good value then I'd suggest they probably aren't for you, but if you just really want an alfa, then you could do worse
