My favourite subject - how sad does that make me sound!!
I have had experience with both the SEAT and the Focus in these form and both are excellent cars, although some what different in character.
The Focus is my personal favourite, being quick, responsive (lack of turbo), as well as having excellent handling. Certainly if you rate handling in your priorities over outright grunt, then this is the car to go for.
The SEAT is a little more refined and softer in its nature, but is a little gruntier. Handling isn't at the same level as the Focus, but if you do motorway miles you may find it a little more comfortable. Incredibly well built as well.
There are several other options on the market that may be worth considering.....
Vauxhall's Astra SRi Turbo - Sort of half way between the Leon and the Focus in character, and quite rare.
Alfa Romeo 147 2.0 - Full of character, but you must make sure the service history is kept up.
Citroen C4 2.0 16v VTR - May struggle to find one at the budget, but they are around. Not overtly sporting in the handling but it is a warm hatch, with half decent grunt.
Fiat Stilo Abarth 2.4 - Again, very few around but full of character, if not the best handlers in the world.
MG ZR 160 - Raw and raucous. Looks the part and is certainly quick. Great value for money although they are starting to look a little dated on the interior.
Peugeot 307 XSi - Not particularly quick and not the handler the old 306 used to be, but a warm hatch none the less. Reasonably well built and good value for money, just not the most inspiring warm hatch on the market.
Renault 2.0 VVT Dynamic - Pretty much the same as the Peugeot.
Toyota Corolla..... Nah, don't bother. Very reliable, and even though it has the same lump as the Celica and Lotus Elise, don't. It just isn't a great car!
VW Golf GTi (Mk4) - Buy the SEAT instead, its a better car.
Best of luck.
Read my motoring and car related diatribe at.........
http://TegTypeR.blog.co.uk
Updated: 16th November 2008