I'd agree, for those general needs and that budget a £400 dell machine will do the job.
As for TV, check this out from Scan, £40.
Compro Videomate.
For an idea of Dell machines, try
here and check out the one in the middle.
For £479 inc Vat and Delivery, it comes with a 17" TFT, a DVD re-writer and a P4 for a generally solid system. Printer included too.
Be aware that for the £479 price you need to change the standard setting back to 1 year warranty (Dell are buggers for automatically bumping up the price for this).